1. Halo: Spartan Assault (Xbox 360) Achievements
2. Extra Credit achievement

Halo: Spartan Assault (Xbox 360)

903

400

28

3.61

18,254

1,605 (9%)

20-25h

Lists

• Sign in or sign up to start making your own lists.

•  Create a list

Game

• 100 want to boost

Extra Credit achievement in Halo: Spartan Assault (Xbox 360)

Extra Credit

Complete all campaign mission specific Assault Ops

0

3 guides

How to unlock the Extra Credit achievement

• Shadow 00 Fox

  16 Jun 2014 14 Apr 2014 20 Jun 2019
  71 1 55

  Actions

  • Report Solution

  GLITCH WARNING!!
  UPDATE 7/9/14: There is a very simple CONFIRMED FIX for this glitch!!
  
  GLITCH Info and how to fix:

  *** Spoiler - click to reveal *** My achievement WAS glitched!
  UPDATED CONFIRMED FIX: (Credit to UnawareBoss!!) His words:
  1. I loaded up Spartan assault and did not choose a save file.
  2. I then went to settings and choose my save file which has the glitched assault op on it.
  3. I went to a assault ops and it says i have 0/90 completed i then loaded up mission 1 and completed my assault op which was glitched.
  4. after that you should have 1/90 completed so i signed out and then back in and when i signed back in my ops was 89/90 BUT my op that was messed up was now fixed 50/50 and not 888/50.
  5. one of my ops was not completed for some reason kill 20 elites but all i did was go and complete that op and pop my achievement unlocked.
  (note from Shadow--I tried this on one of my glitched saved files and it worked first try!)
  
  In order to try to avoid the glitch, when you start your playthrough, be extremely careful with missions A-1a through A-1c. I don't know of any specific way to avoid the glitch, but very carefully approach the right numbers, avoid freezing the game(if you can), and treat it like you're in a fine china shop. Not walking under a ladder or breaking a mirror earlier in the day might help too, there's been no definitive research there though unfortunately. I just hope you can avoid the glitch!!
  There is a workaround on the Xbox One version, but that workaround doesn't work for the 360 version.

  
  General Tips:
  

  *** Spoiler - click to reveal ***You can select "Abort Mission" or "Restart Mission" during a mission and progress will still save.
  
  In general, the damage boost upgrade is the most useful. Consider using it for any mission if you have the credits.(fastest way to get extra credits is to replay the first mission with the Hollow and Pacifist skulls on. You can get 1000XP very fast this way once you get it down using your Regeneration ability at the right times)
  And a time saving tip that Chucklestyle reminded me of: as long as you don't finish the mission, but deliberately fail or die or restart, you will keep the upgrades you purchased before the mission started. This is a great way of not spending extra credits and getting great mileage out of your one buy to work on Assault Ops!
  

  
  Enemies, Turrets, and Vehicle Descriptions:
  

  *** Spoiler - click to reveal ***Enemies:
  

  *** Spoiler - click to reveal ***Grunts(Unggoy):
  Grunt Minor--Small enemy wearing a yellow vest that often runs around and squeals funny. Usually carries a plasma pistol.
  Suicide Grunt--Grunt that runs straight at you holding a plasma grenade in each hand--Run or Kill!
  Grunt Major(Unggoy Ultra)--Grunt in grey fatigues... with better weapons than Grunt Minors. I think they can carry Fuel Rod Cannons to Needlers depending on the mission.
  
  Elites(Sangheili):
  Elite Minor--Tall blue enemy that is very agile, has an energy shield and plasma rifle or needler.
  Elite Major--Looks like regular elites but is red and carries a focus rifle.
  Stealth Elite--Elite that is camouflaged and carries energy swords. Look for faint shimmers of grey/white for the outline.
  Elite Zealot--Elite that is yellow, carries a plasma rifle, and is harder to kill.
  
  Drones(Yanme'e)--The only flying enemies, usually come out of holes in the ground and carry plasma pistols.
  
  Jackals(Kig-Yar Minor)--Little enemies with energy shield 'shields' and a needler.
  
  Brutes(Jirilhanae):
  Jump-Pack Brutes--Very stocky bear-like enemies that have more health than other enemies and carry Bruteshot weapons.
  Brute Chieftain--Just like regular Brutes, except carries a Gravity Hammer and is very dangerous. Also wears a fancy helmet.

  
  Turrets:
  

  *** Spoiler - click to reveal ***Covenant:
  Shade Turret--Stands on a tripod base, is pink, and fires pink/white plasma bolts. Elites and Grunts generally use these.
  AA Turret--VERY dangerous Covenant Turret. Fires massive green plasma bolts that cause extreme damage. Not usable by Spartans.
  
  UNSC:
  Machine-Gun Turret--Looks like a chain-gun attached to a small metal stand on a metal circular base. Fires bullets at a very high rate of speed and is extremely effective against ALL enemies.

  
  Vehicles:
  

  *** Spoiler - click to reveal ***Covenant:
  Ghost--Small red/purple vehicle that floats over the ground and has two front facing plasma repeaters. Very effective in any mission where it's usable. Hijack-able.
  Wraith--Large blue Covenant vehicle that fires Plasma Artillery Balls over long distances in an arc. Massive damage and quite effective. Hijack-able.
  AA Wraith--Like the Wraith, except yellow/brownish and not very effective because you can't fire the gun effectively.
  
  UNSC:
  Elephant--Huge lumbering vehicle that is not Spartan usable but is really cool.... if only you could use it.
  Scorpion--Main battle tank of the UNSC, one main high calibre gun and a small secondary machine-gun. Very effective whenever you get to use it. Better than the Wraith.
  Grizzly--Special battle tank version; this is a BEAST. It destroys anything and everything with it's twin main cannons and secondary machine-guns to mop up the leftovers. VERY EFFECTIVE.

  
  Flood: (only in Co-op missions, but here for reference)
  

  *** Spoiler - click to reveal ***Small Infection Forms--tiny little head-shaped enemies with many tentacles. Always attack in large groups and not very dangerous.
  Yellow Infection Forms--Slightly bigger than common infection forms, Yellow, and Very dangerous is they can latch on as they destroy your shield and you cannot get them off unless your teammate shoots them. Normally only spawn from certain dead Combat Forms.
  Combat Forms--Flood enemies that vary depending on type of Covenant or UNSC force they were before. They look like mutated versions of what they used to be, whether formerly Elite, Brute, or UNSC. Common ones are Shotgun, Assault Rifle, Battle Rifle, Grenade, and Bruteshot Combat Forms.

  
  I wrote this solution to be used with the Ctrl-F function to easily find whichever Op you are looking for. Simply type into the Ctrl-F search box whichever letter, number, and letter code you're looking for!(i.e. A-1a, D-2c, E3-b, etc)
  
  Enjoy!!
  
  All missions Assault Ops grouped by mission:
  

  *** Spoiler - click to reveal ***
  A-1
  

  *** Spoiler - click to reveal ***A-1a
  Warm Up That Pitching Arm
  Kill 3 Grunt Minors with Frag Grenades
  Easy--Very Fast. You start with Frag Grenades and Grunt Minors are the first attackers. Just 'Lt' at them and you've got it.
  A-1b
  Rookie Target Practice
  Kill 20 Elite Minors
  Very Easy--Slow. This will make you replay the mission multiple times, as there are only 4 Elites in it.
  A-1c
  Sidearm Slaughter
  Kill 50 Grunt Minors with a Magnum
  Very Easy--Slow. Annother one that makes you have to replay it, combine this with the previous Assault Op. Switch to your one-hit-kill Magnum and have at it!

  
  A-2
  

  *** Spoiler - click to reveal ***A-2a
  A Shady Detonation
  Destroy 2 Shade Turrets with Plasma Grenades
  Very Easy--Very Fast. Remember, the Shade Turrets are the ones that the Grunts jump into to shoot at you. It takes 2 Plasmas to take one out, so I recommend using a Frag or other weapon first then your Plasma.
  A-2b
  Scorch Mark
  Kill 20 Grunt Minors with a Plasma Pistol
  Easy--Fast. This one goes quickly, with a few level repeats. Shoot the grunt right at the start with your pistol, grab his pistol, and 'headshot' the grunts from then on. Repeat until you get it. Combine this with the next Assault Op! Probably 3 playthroughs for this one.
  A-2c
  Taste Your Own Medicine!
  Kill 40 Elite Minors with Plasma Repeaters
  Very Easy--Slow. Almost the same as above, except kill the Elite right at the start, then use his gun on the rest. Alternatively, you could run past the first Elite to the weapons crate, grab a Repeater, and kill that Elite. If you kill him first, then you can get 5 Elites per playthrough, If you pick up the weapon first you can get 6. Combine with The previous Assault Op.

  
  A-3
  

  *** Spoiler - click to reveal ***A-3a
  Gung Ho!
  Destroy 3 Shade Turrets with a Plasma Pistol
  Easy--Fast. Shade Turrets take two Grenades to blow up, so use one Grenade then Plasma overcharge the turrets. You can grab a Plasma Pistol off the first Grunt. If you're fast, you can combine this with the score challenge, but not recommended. You can definitely combine this with the 40 Grunt kills to save time.
  A-3b
  Expert Target Practice
  Kill 30 Elite Minors with an Assault Rifle
  Very Easy--Slow. Keep your Assault Rifle, and keep replaying the level. I think you get about 7-8 Elites per playthrough, so it's not many repeats. I got this one last of the three.
  A-3c
  Sentry Post
  Kill 40 Grunt Minors with a Shade Turret
  Medium--Slow. Use your Armor Ability and run to each Shade Turret. You can start firing almost as soon as you're in it and it points, so rush to different turrets and target all the Grunts. You can also target grunts who are off-screen! There are a LOT of grunts in this level, so you should get this in about 3 playthroughs if you get them all each go. Combine with the Elite Minors Assault Op--jump out of the turret fast when you see an Elite.

  
  A-4
  

  *** Spoiler - click to reveal ***A-4a
  Stick To This!
  Kill 5 Elite Minors with Plasma Grenades
  Hard--Fast. For this one, jump into the Wraith, destroy the barrier, then proceed upwards on foot. You have the Speed Armor Ability so use it! There's one Elite close, and several more through the level. Try to get a sticky, otherwise they'll dodge. There are more plasmas near the start, go a little up, and on the right side where the Wraith tank won't fit, there are two grunts, two shields, and some plasmas. You can also find more plasmas through the level from dead enemies and some just south of the last AA Wraith. Combine with the next Assault Op.
  A-4b
  Burn Ward
  Kill 30 Grunt Minors with a Plasma Repeater
  Easy--Normal. You start with a Repeater. Like the last, use the Wraith to destroy the barrier, then proceed upwards on foot annihilating all Grunts with your Repeater. You can get more ammo for it from a weapons cache on the left side more than half-way through the level, and of course, dead Elites... combine with the previous Assault Op if you can.
  A-4c
  Wrath of the Wraith
  Destroy 15 Wraiths with a Wraith
  Very Easy--Fast. Jump in the Wraith, and go to town! This was fun, and there's really nothing to say, other than, make sure to keep dodging enemy wraith shots, and keep far enough away that their plasma gunner can't shoot. First time I played this level, I lost my Wraith. Last time I played the level, my Wraith ended with 75% health.

  
  A-5
  

  *** Spoiler - click to reveal ***A-5a
  Meatgrinder Mayhem
  Kill 15 Grunt Minors with a Machine Gun Turret
  Very Easy--Fast. The main turret you'll want to use is the one at the top of the Hornet landing pad. You can probably get all 15 Grunt Minors in one go. Remember though, the yellow ones are Grunt Minors, the white are Grunt Majors. If you don't get it all in one go at that turret, run around to the bottom turret, and go back and forth until you get it.
  A-5b
  Sting Like a Bee
  Destroy 4 Wraiths with a Magnum
  Very Hard--Slowest. There are 3 Wraiths that show up at the end of the mission. One Wraith shows up through the bottom barrier with one minute left, and two more come through the left and right barriers just after when the first countdown reaches zero. To destroy the Wraith with a Magnum though, you need to damage it first with something else down to about 3 bars or less. I recommend using a damage booster when going for this Assault Op. The best way to damage the Wraith is with Plasmas, they take it's health down very fast, and I believe two Plasmas take it's health down about 70-90%. The elites will jump out when it's at about 30% damage though and you can't tell how little health is left at that point because the health bar disappears. So, you could use Plasmas, sentry turrets work very well, or you could even hijack the Wraith and then get yourself shot up while watching the health bar. JUMP OUT before it gets destroyed though or you fail the mission! Either way you do it, Sentry Turrets and Grenades are the best, DO NOT USE the Magnum only, it will run out of ammo fast and I never found more Magnum ammo on the map. Even worse, there are only 3 Wraiths per playthrough and they are at the very end of the playthrough; so if you die, you have to restart and do the base defense all over again; and, there's a 25 second timer that starts once the base is defended so you have just a few seconds before the mission ends. 25 seconds to damage and destroy two more Wraiths with the Pistol.
  A-5c
  Stand-Off Shootout
  Kill 100 Covenant with the Shotgun
  Easy--Slow. Run around with your starting Shotgun blasting Grunts in the face! The grunts all die fast, there's more shotgun ammo above the base and in a weapon's cache on the left corner of the actual landing pad. It will take more than one playthrough, but kinda fun.

  
  
  
  B-1
  

  *** Spoiler - click to reveal ***B-1a
  Wave Breaker
  Kill 20 Suicide Grunts with a Machine Gun Turret
  Very Easy--Very Fast. Just jump on one of the Gun Turrets right outside the base and fire away! Grunts start coming right away, just make sure to get the Elites too.
  B-1b
  Ring of Fire
  Kill 30 Grunt Majors with an Incendiary Grenade
  Medium--Slow. You start with 3 Incendiary Grenades, and there are 3 more in a grenade box near the middle of the map. So, you have only 6 Grenades per try. Remember, you are going for the white Grunt Majors with the Incendiaries, and try to combine this with meleeing Suicide Grunts. You'll have to restart quite a few times to get your 30, at least 5 times or more.
  B-1c
  Power Punch-Out
  Kill 40 Suicide Grunts with a Melee Attack
  Easy--Medium. For this one, I'd recommend spending some XP on an Overshield bonus for this mission, as I did this without the overshield and kept dying from the suicide grenades. You'll probably have to restart the level a few times, but with an overshield bonus you can do this WAY faster than I did it. The Sprint Armor Ability pickup is useful if you don't use the Overshield Armor Ability though. It is located to the right side of the map, right next to the destroyed Wraith. If you use the Sprint ability, you can rush around the map, and if you're quick enough, you can even string a couple suicide melees together.

  
  B-2
  

  *** Spoiler - click to reveal ***B-2a
  Up Close and Personal
  Kill 20 Elite Minors with a Shotgun
  Normal--Easiest. You'll want to switch to a Shotgun at the start from the ammo crates. Also grab the Speed Armor Ability. Then, work on this one at the same time as the other two Assault Ops. There are enough Elites in the level to get this in one go, but don't worry about restarting or playing another as you work for all three Assault Ops. Elites go down in 1 or 2 Shotgun shots. There is more Shotgun ammo scattered through the level so don't worry about running out.
  B-2b
  Chain Reaction
  Kill 50 Suicide Grunts with SMGs
  Easiest--Medium. Very simple, just wait for the defense segments of the mission, and then lay into the Suicide Grunts with your SMGs. There are very many Suicide Grunts, so you could get this in one go probably(I died plenty being stupid with my shields down, lol), so had several go's at this. Quite fun.
  B-2c
  Burn Baby Burn!
  Kill 100 Covenant with Incendiary Grenades
  Easiest--Slow. This looks hard at first, but you can spawn camp the Covenant!! A max of 11 Incendiary Grenades(IG's) are in this mission. You start with 2 IG's, you'll want to pick up the 3 near the start, and then move to the first defense part. Watch where the Covenant are spawning through the barriers, and then throw 2 IG's, one to each spawn point, and watch the Covenant walk into the flame and burn up. When the flame dies out, make some more! When you run out of IG's, mop up this area, stock up on ammo, and move to the next defense portion picking up the 3 more IG's on the right side of the path when you're almost there. Repeat the same thing as before with the spawn points. When you run out of IG's, there are 3 more IG's on the path to the south starting below the Wolverines, along with a few Grunts. Pick those up, run back up top, and spawn camp some more. This will take a few retries of the mission to get all 100, but it's fun.

  
  B-3
  

  *** Spoiler - click to reveal ***B-3a
  Pincushion
  Kill 20 Jackals with a Needler
  Easiest--Normal. This is the easy Assault Op. Simply gun down a Jackal, take his Needler, and then shoot all the other Jackals with the Needler taking their Needler ammo as you go. You should be able to get this on your first run if you don't die. Combine with the other Assault Ops!
  B-3b
  Trigger Happy Demolition
  Destroy 10 Shade Turrets with the Shotgun
  Easy--Very Slow. Annoying Assault Op, there are only two Shade Turrets on the map. Simply throw one Frag Grenade at them then Shotgun them to pieces. Very quick once you get to the Turrets. Frags are better because the Grunts jump out after the grenade hits. There's one Turret up to the right and one Turret down to the left. I don't believe the Fuel Rod Turret counts for this. 5 restarts required minimum! Also, it seems like it sometimes doesn't count the Shotgun Turret kills.
  B-3c
  Catch!
  Kill 50 Grunt Majors with Grenades
  Normal--Very Slow. Another annoying one that requires restarts. The only Grunt Majors on the map are around the Gold Elites at the top right of the map. There are approximately 10 white Grunt Majors up there. You could die after killing them though to get quicker progress and to quickly restart the level.

  
  B-4
  

  *** Spoiler - click to reveal ***B-4a
  Clean-Up on Aisle Epsilon
  Kill 20 Grunt Majors with a Shotgun
  Easy--Slow. There is a Shotgun near the start of the bridge you need to cross, lying in front of some wreckage, in the middle of the bridge. There is also another Shotgun halfway across the bridge near the north side of the bridge. The white Grunt Majors are along the two paths up into the Mega Turrets. There are 8 on each run through, with 5 on the left path and 3 on the right so this will take a minimum of 3 run-throughs. They are very easy targets if you keep moving.
  B-4b
  Plasma Perimeter
  Kill 10 Elite Minors with a Shade Turret
  Normal--Medium. There are a few tricks to this. You can either do it using the Speed Armor Ability which is found at the very east barrier screen. Or, a very handy little trick is running close to a Grunt occupied Shade Turret, then throwing your default Armor Ability which is the Decoy. The enemies all shoot at it and you can just run up to a Shade and hit "X" to hijack it, then shoot the surrounding Elite(s). You'll have to repeat the mission a few times for this. Try to combine the Assault Ops here.
  B-4c
  Staring Death in the Eyes
  Kill 30 Elite Minors with a Wraith
  Easy--Slow. You need to be careful to not get blown up by the Mega Turrets while attacking in a Wraith. The only Elites in this mission are Elite Minors, so no worries there. There are quite a few Elites, at least 10 each time, so this should take 4-5 tries depending on how you kill the Elites. There are 3 Wraiths in the mission, two you can drive and one hijackable, but it's really not worth it if you can keep your Wraith alive. I'd also recommend just doing the first part repeatedly as the rest of the Elites are too far into the mission to make it worth while unless you're doing the other Assault Ops still. Basically, run to the first empty Wraith, kill all the Elites on the bridge, shoot the occupied Wraith past the bridge so the Elite jumps out then kill him, go up the left path past the Grunt Majors and get 2 more Elites up that path, then suicide or restart mission.

  
  B-5
  

  *** Spoiler - click to reveal ***B-5a
  Head On!
  Destroy 20 Wraiths with a Scorpion
  Easy--Medium. This will require at least 3 playthroughs because there are only 7 Wraiths each time. Really easy, basically blow up everything you can see. Really fun!
  B-5b
  Fight Vapor with Fire
  Destroy 30 Ghosts with a Scorpion
  Easy--Slow. This will require at least 5 playthroughs. I think there are only about 7 Ghosts each playthrough, and they are scattered all around the map. Just blow everything up, and combine this with the Wraiths.
  B-5c
  Back to the Grave
  Destroy 20 Wraiths with a Ghost
  Normal--Medium. This is fun, as the Ghost is so extremely powerful! I recommend either jumping out of the Scorpion at the start and using your Speed Armor Ability to get over to my favorite Ghost, all the way to the right side. It's occupied, but you can easily Speed Boost around it and hijack it with "X". Or, you can run the Scorpion that way, but DO NOT destroy the Wraith in your path. You'll want to take that out with the Ghost.

  
  
  
  C-1
  

  *** Spoiler - click to reveal ***C-1a
  Precision Disassembly
  Destroy 4 Shade Turrets with a Focus Rifle
  Easy--Slow. There are several Elite Majors in this mission. Take the Focus Rifle from the first one you see, and use it on the only Shade Turret in the mission. For a much easier time, hit the Turret with 1 Grenade of any type, then finish it off with the Focus Rifle. Minimum 4 playthroughs for this one Assault Op.
  C-1b
  Shooting Range
  Kill 50 Covenant using Rifles
  Very Easy--Medium. You start with a Rifle, and there are lots of easy covenant targets through the mission. You could even kill your teammates for more Rifle ammo. It's a really short mission also, so repeats quickly.
  C-1c
  Plasma Burn
  Kill 40 Covenant with Plasma Grenades
  Medium--Slow. This is an annoying Assault Op because you have to rely on grenade drops from Covenant since there are only 3 Plasma Grenades to pick up in the mission, over halfway through it on the north-west side of the main path. I discovered though that if you kill Elite Minors with grenade hits, they seem to more often drop plasmas, which you can then promptly hit some Grunts or Jackals with. Also, Elite Majors(red) always drop a Plasma. Quite luck based, it will take several playthroughs minimum, up to 10+ playthroughs.

  
  C-2
  

  *** Spoiler - click to reveal ***C-2a
  Explosive Apparation
  Destroy 5 Ghosts using Frag Grenades
  Normal--Medium. There are two Ghosts that appear during this mission, as part of the 3rd or 4th wave. Just make sure to have a Frag Grenade do the final damage to them, and you're good. You could always use a Plasma first then a Frag to make it easier. Minimum 3 playthroughs since there are only 2 Ghosts each time. One comes from the south-west, and one from the north. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. I also recommend the damage boost upgrade. Ghosts only take one Frag then.
  C-2b
  Moving Target
  Kill 40 Drones with an Assault Rifle
  Very Easy--Normal. There are a number of Drones that appear from the two holes several times during the mission. There are at least 20+ per playthrough. There are at least two Assault Rifles in the mission for pickups, one is to the far east along the path, and another is to the far west near the boxes. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. Recommended to use damage boost upgrade.
  C-2c
  Beam of Light
  Kill 80 Covenant with a Focus Rifle
  Very Easy--Normal. There are lots of Grunts and Elites in this mission. If you've already got your Assault Rifle challenge, then you can target the Drones also for more Covenant kills. I'd say you can get at least 30+ Covenant kills in one playthrough with the Focus Rifle. There are 3 Focus Rifle Pickups. One a little to the north next to some random clutter, one a little to the south just to the left of a big rock, and one more to the far west near the Assault Rifle. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. Recommended to use damage boost upgrade.

  
  C-3
  

  *** Spoiler - click to reveal ***C-3a
  A New Sheriff in Town
  Kill 20 Elite Minors with Pistols
  Medium--Fast. I verified that you can use the Magnum for these Elite Minors as well as the Elite Majors. *Chucklestyle discovered that the Needler counts as a pistol!--useful for saving all your Magnum for the Elite Majors!* *Special credit to Prestd for discovering a wonderful trick to get endless enemies to spawn quickly in this mission!!* "To get the enemies on mission C-3 to constantly spawn, you need to destroy the first 4 wraiths and then run to the end of the level, enemies including the Elite Majors will come pouring through the light wall." There is a Speed Armor Ability up the right side of the map, and you can use the Grenades scattered through the mission for the Wraiths. 2 Grenades for each AA Wraith, and 3-4 Grenades for each regular Wraith.
  C-3b
  Armed Ambush
  Destroy 10 Wraiths with a Machine Gun Turret
  Very Easy--Fast. There are quite a few Machine Gun Turrets scattered through the map. Combine this with the Speed Armor Ability, and you can just run from turret to turret destroying all the Wraiths quickly. Will take a couple playthroughs.
  C-3c
  Dirty Davis
  Kill 20 Elite Majors using a Magnum
  Medium--Medium. Thanks to Prestd, there is a great trick to get more Elite Majors to spawn! "To get the enemies on mission C-3 to constantly spawn, you need to destroy the first 4 wraiths and then run to the end of the level, enemies including the Elite Majors will come pouring through the light wall." There are also approximately 4-5 Elite Majors that will rush you once you've advanced about halfway up the map. I recommend using a Plasma overcharge to take down their shields, then a quick Magnum shot. Otherwise, it takes at least 5-6 Magnum shots to take them out. Don't forget to use the Speed Armor Ability, and also grab Grenades to help with the Wraiths.

  
  C-4
  

  *** Spoiler - click to reveal ***C-4a
  Razorback
  Kill 10 Elite Majors with a Needler
  Very Easy--Medium. There are 4-5 Elite Majors in this level, and they go down very quickly with a Needler. Combine and finish this Assault Op with one of the other two Assault Ops before focusing on the Stealth Elites. You can easily get more Needler ammo from the Jackals in this level, or the ammo crates.
  C-4b
  Guiding Light
  Kill 20 Stealth Elites with a Focus Rifle
  Very Easy--Fast. Once you have finished with the Elite Majors, you can start the level, kill the first two Stealth Elites, then Focus Rifle one of the explosive glowing objects and kill yourself. Reload the starting checkpoint, and repeat 10 times very quickly to get this Assault Op.
  C-4c
  Iron Fist
  Kill 20 Stealth Elites with Melee Attacks
  Very Easy--Fast. Once you have finished with the Elite Majors, you can start the level, kill the first two Stealth Elites, then Focus Rifle one of the explosive glowing objects and kill yourself. Reload the starting checkpoint, and repeat 10 times very quickly to get this Assault Op.

  
  C-5
  

  *** Spoiler - click to reveal ***C-5a
  Turn Off Their Lights
  Kill 10 Elite Majors with a Focus Rifle
  Very Easy--Very Fast. Found a better way. Save your Focus Rifle(pickup near the plasmas), use the damage upgrade. That way it takes far less to kill the Elite Majors, and you can pick up their ammo. Elite majors start rushing you when the countdown reaches 1:26 left. The Focus Rifle takes them down very quickly, and I was able to get all 10 in one go. Don't forget to run away from the action if your shields are down!
  C-5b
  Brutal Burnout
  Kill 5 Brute Chieftains with a Shade Turret
  Very Easy--Very Fast. To get this the fastest, simply run around at the start and kill the first 3 Grunt Minors, then run to one of the Shade Turrets and kill the Brute Chieftain who just spawned. Die, rinse, and repeat 4 more times.
  C-5c
  Special Delivery
  Kill 50 Drones with Plasma Grenades
  Very Hard--Very Slow. Extremely annoying, unless someone's figured out a trick for this. You have to stand far enough away so that your Plasmas land on the ground underneath where the Drones will be flying and shooting at the engineer. If you do it right, the blast radius will get some of the Drones at the same time. This will take many restarts or playthroughs. Figure on 6+ replays. There are approximately 10 Drones in 2 waves, and there are 3 Plasma Grenades to the left of where you start. Also, the Brute Chieftain drops another Plasma, and sometimes Grunts will drop Plasmas also. How I finished grinding mine out was this way: immediately as it starts, I went right, shotgunned the two Grunts, activated my speed boost, ran left and shotgunned the 3rd grunt. Then, Shotgunned the Brute Chieftain while picking up the other Plasmas, and grabbing the Plasma the Brute drops. From here, I positioned myself a little below the left lower gun cover near where the engineer works, and held the "LT" down so I could position my Plasmas exactly where I wanted. I found the best spot was just a little bit off center to the right, just above the engineer and still in the area behind the gun cover barricades. I also found that throwing the Plasmas when the Drones were not over that spot was best, as they usually flew over it just in time to get blown up. I managed to get a quad-kill with one Plasma this way, although that was very rare.

  
  
  
  D-1
  

  *** Spoiler - click to reveal ***D-1a
  All in a Day's Work
  Kill 20 Grunt Minors
  Very Easy--Very Fast. There can be literally hundreds of Grunts on this mission.. they will continually spawn out of the bottom left barrier and spawn faster as the countdown goes lower. Use your favorite weapon, and get this fast!
  D-1b
  Death From Above
  Kill 20 Jump-pack Brutes with a Brute Shot
  Very Easy--Fast. Simplest way to do this--wait on the starting platform before destroying the first barrier. Brutes will continually respawn, and you can just camp their landing sites. 2 hits with the Brute Shot will take them out, and they drop more ammo. Figure on one Brute every 7+ seconds, and you're done!
  D-1c
  Premature Detonation
  Kill 40 Suicide Grunts with a Focus Rifle
  Medium--Normal. This one is slightly tricky. Elite Majors only start spawning when the countdown reaches about 1 minute. At this point, Covenant start pouring through the south-west barrier rapidly, including Grunt Minors, Suicide Grunts, Elite Majors mainly, and some remaining Elite Minors. I recommend taking the Overshield Armor Ability for this mission(I took the Spartan Laser for the doors also), camp the barrier, and when the Elite Majors start spawning, activate
  your Overshield, swoop in, grab a Focus Rifle, then stand to one side and just continually fire the beam across the entrance. Elite Majors will charge you if you are close enough, and they'll simply drop more Focus Rifle ammo in front of you to pick up. I died quite a few times trying this, but finally was getting quite successful. If you want to finish the mission, make sure to start heading upwards with at least 10 seconds left assuming you already destroyed the armory door. You can rack up amazing points this way too. When I finally finished one of the missions I ended up with the 6th place overall score on the public leaderboards doing it this way!

  
  D-2
  

  *** Spoiler - click to reveal ***D-2a
  Who's Laughing Now!?
  Kill 10 Jackals with an Assault Rifle
  Very Easy--Very Fast. There is an Assault Rifle box straight ahead from where you spawn, against the south side of the rock wall that divides the two northern paths. There is also at least one more AR ammo box further through the mission. And, you just need to point at Jackals and pull the trigger. AR's take care of Jackals really fast. You can easily get 10 in one playthrough.
  D-2b
  Grapple Hook
  Kill 20 Jump-pack Brutes with a Needler
  Easy--Medium. The Jump-pack Brutes reinforce the Covenant attacks on the 3 outposts you need to protect and liberate. There are 2 Brutes at each outpost that 'drop' in, so you can get a max of 6 per playthrough. There are lots of Needler ammo pickups you can get from dead Jackals so not a problem, and Brutes go down quickly to Needler ammo.
  D-2c
  Anvil
  Kill 5 Brute Chieftains with a Brute Shot
  Easy--Medium. There is only one Chieftain per playthrough, and he spawns at the second outpost; so maybe play up to where he is, then die after taking out the Brutes and repeat making this not quite so slow. Just remember to use the Brute Shot on him, and collect more ammo from the Jump-pack Brutes.

  
  D-3
  

  *** Spoiler - click to reveal ***D-3a
  Bear Hug
  Destroy 10 Wraiths with a Grizzly Tank
  Very Easy--Fast. Most of the Wraiths are at the beginning of the mission. There are at least 5 at the start, and they are very easy to destroy with a Grizzly Tank--one shot fires two barrels and takes out a Wraith. Repeat the beginning twice, and you've got this Assault Op.
  D-3b
  Haunting
  Kill 20 Grunt Minors with a Ghost
  Very Easy--Fast. This can go even faster if you take the damage boost upgrade on the loadout screen. I recommend combining with the SMG Assault Op. You can easily get into a Ghost by using your default Decoy Armor Ability to distract the Ghost, running up, and pressing "X". There is a Ghost just after the first 5 Wraiths, right behind the first Shade Turret. There is also another you could hijack just a bit further north. From then on, especially with a damage boost, you can wipe everything out. You should be able to get a minimum of 10 Grunt Minors per playthrough.
  D-3c
  Drive By
  Destroy 20 Wraiths with SMGs
  Normal--Fast. The way I did this was I first destroyed my companion tanks at the start so they wouldn't shoot the Wraiths, then I used the secondary gun on the Grizzly to damage the Wraiths far enough to get the Elites to jump out. I proceeded to run over the Elites with my Grizzly, then jumped out and SMG'd the Wraiths. That's an easy way to get 5 right at the start, and there are at least 2 more during the mission that you could use your Grizzly or a Ghost to damage and repeat with the SMG. Minimum of 3 playthroughs.

  
  D-4
  

  *** Spoiler - click to reveal ***D-4a
  Molten Rain
  Kill 10 Elite Majors with a Plasma Repeater
  Easy--Fast. There are only about 5 Elite Majors that spawn in this mission. They all spawn as part of the Covenant that are chasing the Elephant across the bridge. Make sure to pick up a Plasma Repeater, and target the Red Elite Majors. The Blue Elites drop Plasma Repeaters just in case you didn't remember...
  D-4b
  Punctured Phalanx
  Kill 20 Jackals with SMGs
  Hard--Very Slow. The only Jackals in this mission spawn at the very end as the Elephant is going through the barrier to complete the mission. They spawn with groups of Suicide Grunts making it very hard to actually take out the Jackals before they get blown up. This will take multiple playthroughs, possibly up to 10 or more as you can hardly guarantee any Jackal kills. Using the Shock Armor Ability to freeze the Jackals and Grunts might help a little. I found at least 2 SMG pickups through the mission.
  D-4c
  Blast of Glory
  Kill 100 Suicide Grunts with a Plasma Pistol
  Very Easy--Slow. You start with a Plasma Pistol, and there are loads of Suicide Grunts to shoot at. I recommend the damage boost upgrade. Also remember that Drones also drop Plasma Pistols as you will run out of ammo. There are pretty much Suicide Grunts everywhere in this mission. It will take a couple playthroughs at least, but goes fairly quickly considering you have to get 100 kills!

  
  D-5
  

  *** Spoiler - click to reveal ***D-5a
  Is This Yours?
  Kill 20 Suicide Grunts with Incendiary Grenades
  Very Easy--Fast. Suicide Grunts will only come at you from the top left barrier near the start of the mission unfortunately, so you'll need to capitalize on the Suicide Grunts here. Once again, it's very helpful to throw Incendiary Grenades right next to the barrier to spawning Covenant automatically die in the flames. You start with 3 Incendiary Grenades, and there are 3 more in a grenade chest straight south of where you start, opposite the Elephant that was unloading the troops. You could get up to 6 or more each time through using all the grenades.
  D-5b
  Border Patrol
  Kill 100 Covenant with a Machine Gun Turret
  Very Easy--Very Fast. This is great fun, you have a MG Turret near the top, and one near the bottom. Just get on the gun and blast away! You should be able to do this in about 2 playthroughs.
  D-5c
  Hammer to a Gunfight
  Kill 10 Brute Chieftains with a Magnum
  Very Easy--Slow. There are only two Brute Chieftains per playthrough, and they both come from the north-west when defending the second group of escaping survivors. Chieftains go down easily, although I did have a damage upgrade equipped. With the damage upgrade Chieftains only took about 4 Magnum shots each. Once you kill the second Chieftain, the mission is almost over... and to get the next you you have to replay the whole mission back up to that point. Update!! I just got 3 Chieftains on my re-run of this achievement to unglitch it. I got two up the left side, and one more came from the bottom right near the second drop-ship!

  
  
  
  E-1
  

  *** Spoiler - click to reveal ***E-1a
  Blind Spot
  Kill 10 Drones with a Wraith
  Easy--Medium. There is only one Wraith in the mission, about halfway through. You need to either steal it with Invisibility on or just hijack it with Invisibility on. The only Drones you can get with the Wraith fly up out of the center hole in the map. -- Credit to Chucklestyle: you should be able to bait towards the wraith a group of 6 drones that fly out of the center hole, and if you avoid the Drones near mission start, you can get some of them as well. Should only take two runs through!
  E-1b
  Let It Rain!
  Kill 20 Stealth Elites with SMGs
  Easy--Medium. There are a lot of Stealth Elites in this mission, and you start with SMGs. I didn't find any other SMG ammo through the mission though, and I recommend you use the damage upgrade on the loadout screen. There are 2 Stealth Elites up the left side at the start, 2 more up the middle path, 2 more where the Wraith is(check the sides of the Wraith area), and at least 2 more at the final area. Should take at least 3 playthroughs.
  E-1c
  Come out of the Shade
  Destroy 10 Stealth Elites with a Shade Turret
  Hard--Slow. This one is very annoying, as you have to lead the Stealth Elites up to the Shade Turrets, and then shoot them before they run away. I had success getting at least one Stealth Elite each time using the Shade Turret just south of the Wraith, and at least two more Stealth Elites in the final area, using the closest Shade Turret. You can sit in that final Shade Turret and snipe the red squares off the screen. Just go by the map, and aim and shoot in the direction, and you should see your score go up when you get a hit. -- Credit to Chucklestyle, if this works as well as he said, it's a fantastic find! Can anyone confirm? "You can bait the stealths and as long as you're not facing them they should follow you all around the level. I would head left from start and let the first one kill my team, then lure him up to the first turret. Make your way up to the 2nd turret, jump in it and waste everything with the turret, then you can lure at least a few more to this turret.

  
  E-2
  

  *** Spoiler - click to reveal ***E-2a
  Light at the End of the Tunnel
  Kill 20 Grunt Majors with a Focus Rifle
  Very Easy--Fast. Work on the Elite Majors Assault Op first, the others secondary. You start with a Focus Rifle, and there is unlimited ammo for it in a cache on the right side of the pathway. I recommend using the bonus damage upgrade to get the fastest possible kills. There are quite a few white Grunt Majors, and you should be able to get this in one playthrough.
  E-2b
  Scorched Earth
  Kill 10 Elite Majors using Incendiary Grenades
  Normal--Very Slow. The Elite Majors only show up close to the end of the mission, and you have only 3 Incendiary Grenades to start with. I wasn't able to find any other Incendiary Grenades either unfortunately. I had a very hard time actually targeting the Elite Majors with the Grenades. I usually missed at least one grenade hit, so it took me at least 5 playthroughs to get this. If you're very accurate, you could probably do this in 4 playthroughs.
  **Note thanks to Shinnizle!
  ""Just letting you know that near a (3) plasma grenade pickup on the left of the map, there is a Stun armor ability pickup. It proved very useful to me in making the Incendiary grenade kills on the Elite Majors. And shooting them a little first helps making sure they die by the grenade.""
  E-2c
  Fight Plasma with Plasma
  Kill 100 Grunts with a Plasma Pistol
  Very Easy--Slow. Work on the Elite Majors Assault Op first, the others secondary. The first Grunts will drop Plasma Pistols, and you can just keep killing grunts from then on easily. It will take a couple playthroughs at least though. I highly recommend the damage boost upgrade.

  
  E-3
  

  *** Spoiler - click to reveal ***E-3a
  All Charged Up
  Kill 30 Jackals with a Plasma Pistol
  Easy--Slow. Go north, stealth, kill a grunt, take his Plasma Pistol, and then proceed to use it against all the Jackals you can find. There will be quite a few, I'm guessing at least 20 Jackals per playthrough, however this just takes a long time to do.
  E-3b
  Dynamite Fishing
  Kill 50 Grunt Majors with Grenades
  Easy--Slow. You start with some grenades, and just run around picking up grenades and whenever you see a white Grunt Major use a grenade on him. You'll get this eventually around when you get the Jackal Assault Op.
  E-3c
  Stick Around!
  Kill 100 Covenant with a Needler
  Easy--Slow. Kill a Jackal, take his Needler, then Needle every enemy that isn't a Grunt Major or a Jackal, as you can work on all 3 Assault Ops at one time.

  
  E-4
  

  *** Spoiler - click to reveal ***E-4a
  Ghost Blaster
  Destroy 5 Ghosts using a Plasma Pistol
  Very Easy--Fast. There is a very very easy way of doing this. You start the mission with a Plasma Pistol and there is a parked Ghost straight north from the start. Just run up there, and overcharge the Ghost 3 times, die, and repeat 5 more times!
  E-4b
  Plasma Transfusion
  Destroy 10 Shade Turrets with a Ghost
  Easy--Medium. There is a Ghost straight up from the start, and there are at least 3 Shade Turrets you can take out with your Ghost during the mission. Just repeat several times and you'll get this quickly.
  E-4c
  Road Warrior
  Kill 50 Covenant with a Ghost
  Very Easy--Fast. Take the Ghost from the beginning of the mission and just kill everything with it. Very easy. You probably won't get 50 in one playthrough, but 2 should do it! Just watch out for Wraith shots.

  
  E-5
  

  *** Spoiler - click to reveal ***E-5a
  Rodent Removal
  Kill 10 Jackals
  Very Easy--Very Fast. Do not worry about this one, you'll get it at the same time as you kill Jackals with Brute Shot.
  E-5b
  Exterminator
  Kill 25 Elites with an Assault Rifle
  Easy--Fast. There is an Assault Rifle crate on the left side of the area. There are about 8 Elites that come through the mission, so you'll have to replay it about 5 times assuming you get all the Elites with an Assault Rifle.
  E-5c
  Perosus Latrunculus Exterminatus
  Kill 20 Jackals with a Brute Shot
  Very Easy--Fast. If you want to do this one extra fast, simple start the mission, take out the Jackals facing you with the Brute Shot, and then die, and restart.

  
  
  
  F-1
  

  *** Spoiler - click to reveal ***F-1a
  Ballistic Engineering
  Destroy 5 Shade Turrets with a Magnum
  Easy--Fast. I recommend the damage booster for this one. Use one grenade on the turrets, and then finish off with the Magnum. There are at least 4 Shade Turrets scattered around the area, and you could get this easily in two playthroughs. There is no more Magnum ammo though, so watch your supply.
  F-1b
  Plastered Purple
  Kill 20 Elites with Frag Grenades
  Normal--Slow. You start with 3 Frag Grenades, and that's it. You'll just need to be very accurate with the Elites, as I found the Frags missing often and the Elites also running away from them. Die and restart if this is your last Assault Op after you use your third Frag Grenade, and be careful you don't accidentally use your Frags instead of Plasmas!
  F-1c
  Carpet Bombing
  Kill 60 Covenant with a Brute Shot
  Very Easy--Fast. I recommend the damage booster so you can one-shot Brutes with the Brute Shot. Otherwise they are two shots. There happens to be unlimited Covenant and unlimited Brute Shot spawns in this mission. On the top left are of the map, where the Jump-pack Brute flies in, you can kill him and take his Brute Shot, and just keep killing Covenant and spawn killing the Brute for more ammo. Works great.

  
  F-2
  

  *** Spoiler - click to reveal ***F-2a
  Mauled to Death
  Destroy 10 Ghosts with a Grizzly Tank
  Very Easy--Medium. You start in a Grizzly! There are only about 3-4 ghosts per playthrough, and they are NO match for a Grizzly. Enjoy this mission. Just watch out for the Mega-turret shots as they can damage your Grizzly quite fast.
  F-2b
  Mine Field
  Kill 20 Suicide Grunts with a Scorpion Tank
  Easy--Slow. You start in a Grizzly! Jump out and get in the Scorpion just a bit farther up. There are not many Suicide Grunts in this mission, maybe a total of 8, and keeping the Scorpion tank alive can be challenging. Just be very careful about the Mega-Turret shots, Ghosts, and Wraiths and you should manage. It takes a while though. I highly recommend the damage boost upgrade to keep your Scorpion safer through offense! (updated starting tank thanks to | LUNCHTREY I )
  F-2c
  Beyond the Grave
  Kill 60 Covenant with a Ghost
  Easy--Medium. Quite fun. Head north until you see a Ghost, hijack it, and then melt everything with Plasma! Ghosts aren't invincible so use with care though, stay out of range, and do NOT get hit by the Mega-Turret shots.

  
  F-3
  

  *** Spoiler - click to reveal ***F-3a
  Voodoo Doll
  Kill 10 Jackals with a Needler
  Easy--Fast. You start with a Needler, and there are plenty of Jackals near the start. If necessary a second playthrough should easily get you this Assault Op.
  F-3b
  Puncture Burn
  Kill 30 Grunts with a Plasma Repeater
  Very Easy--Fast. You start with a Repeater--just use it on any Grunts you see, and you should have this one easily in two playthroughs. You could always restart after clearing out the first Grunts also.
  F-3c
  Explosive Arsenal
  Kill 60 Elites with Frag Grenades
  Hard--Very Slow. This is a stupid Assault Op. You start with 3 Frag Grenades, and there are no more. What I did was load up the mission, run straight for the first Elite ignoring all other Covenant, Frag him, if successful, run straight to the 2nd Elite who is further north and east, Frag him, if successful run to the last starting Elite who is at the far east barrier. As soon as I threw all 3 Frags and got my kills, I would restart the mission and repeat. It does count. Takes a minimum of 20 restarts, figure on closer to 40-50 restarts though because of grenade aiming and Elites moving.

  
  F-4
  

  *** Spoiler - click to reveal ***F-4a
  Great Balls of Plasma
  Kill 10 Elites with a Shade Turret
  Easy--Very Fast. The trick for this is to stealth and take over the Shade Turret at the far west shield generator, and then just camp in it shooting everything that comes.
  F-4b
  Slugger
  Kill 20 Stealth Elites with a Melee Attack
  Easy--Fast. I highly recommend the damage upgrade, because then the Stealth Elites are only two melees. There are a lot of them, at least 10 per playthrough, so just go through and melee them all. Two playthroughs should easily do it.
  F-4c
  Bug Fixer
  Kill 80 Drones with a Plasma Pistol
  Normal--Medium. My estimate on the total number of Drones for one playthrough is close to 30. They spawn out of the holes next to each path, and usually more will spawn after you complete an objective and then repass an area that you previously cleared. The best place for Drone killing is the shield generator on the right side, as a stream of about 12 Drones attacks at that objective. Just run around the paths and 3-4 Drones will spawn at a time. Then complete some objectives, more will spawn, etc.

  
  F-5
  

  *** Spoiler - click to reveal ***F-5a
  Rain of Pain
  Kill 20 Elites with a SMG
  Easy--Medium. Go for the Suicide Grunt Assault Op first! I highly recommend damage upgrade for this Assault Op. After finishing with the Suicide Grunts, go back to the start, gun the two Elite Majors down with your SMG, and immediately restart. Way faster than going through the mission!
  F-5b
  Return to Sender
  Kill 20 Suicide Grunts with Plasma Grenades
  Easy--Very Slow. Suicide Grunts are few and far between on this mission unfortunately. There might be a total of 5-6 per mission, so you will have to make multiple playthroughs. Fortunately there are LOTS of Plasma Grenades lying around. Take a Focus Rifle, unlimited ammo from the cache, and just gun down everything that isn't a Suicide Grunt.
  F-5c
  Laser Surgery
  Kill 40 Elites with a Focus Rifle
  Easy--Slow. Go for the Suicide Grunt Assault Op first! I highly recommend damage upgrade for this Assault Op. After finishing with the Suicide Grunts, go back to the start, run across the bridge, activate Speed Armor Ability as soon as you can, race to the Focus Rifle cache just on the left side of the big center hole, grab a Focus Rifle, gun down the two Elite Majors, and restart level. Repeat 20 times or fewer depending how many you got while going for Suicide Grunts. Way faster than going through the mission!

  
  
  

  All missions Assault Ops at once(best for using Ctrl+F):
  

  *** Spoiler - click to reveal ***A-1a
  Warm Up That Pitching Arm
  Kill 3 Grunt Minors with Frag Grenades
  Easy--Very Fast. You start with Frag Grenades and Grunt Minors are the first attackers. Just 'Lt' at them and you've got it.
  A-1b
  Rookie Target Practice
  Kill 20 Elite Minors
  Very Easy--Slow. This will make you replay the mission multiple times, as there are only 4 Elites in it.
  A-1c
  Sidearm Slaughter
  Kill 50 Grunt Minors with a Magnum
  Very Easy--Slow. Annother one that makes you have to replay it, combine this with the previous Assault Op. Switch to your one-hit-kill Magnum and have at it!
  A-2a
  A Shady Detonation
  Destroy 2 Shade Turrets with Plasma Grenades
  Very Easy--Very Fast. Remember, the Shade Turrets are the ones that the Grunts jump into to shoot at you. It takes 2 Plasmas to take one out, so I recommend using a Frag or other weapon first then your Plasma.
  A-2b
  Scorch Mark
  Kill 20 Grunt Minors with a Plasma Pistol
  Easy--Fast. This one goes quickly, with a few level repeats. Shoot the grunt right at the start with your pistol, grab his pistol, and 'headshot' the grunts from then on. Repeat until you get it. Combine this with the next Assault Op! Probably 3 playthroughs for this one.
  A-2c
  Taste Your Own Medicine!
  Kill 40 Elite Minors with Plasma Repeaters
  Very Easy--Slow. Almost the same as above, except kill the Elite right at the start, then use his gun on the rest. Alternatively, you could run past the first Elite to the weapons crate, grab a Repeater, and kill that Elite. If you kill him first, then you can get 5 Elites per playthrough, If you pick up the weapon first you can get 6. Combine with The previous Assault Op.
  A-3a
  Gung Ho!
  Destroy 3 Shade Turrets with a Plasma Pistol
  Easy--Fast. Shade Turrets take two Grenades to blow up, so use one Grenade then Plasma overcharge the turrets. You can grab a Plasma Pistol off the first Grunt. If you're fast, you can combine this with the score challenge, but not recommended. You can definitely combine this with the 40 Grunt kills to save time.
  A-3b
  Expert Target Practice
  Kill 30 Elite Minors with an Assault Rifle
  Very Easy--Slow. Keep your Assault Rifle, and keep replaying the level. I think you get about 7-8 Elites per playthrough, so it's not many repeats. I got this one last of the three.
  A-3c
  Sentry Post
  Kill 40 Grunt Minors with a Shade Turret
  Medium--Slow. Use your Armor Ability and run to each Shade Turret. You can start firing almost as soon as you're in it and it points, so rush to different turrets and target all the Grunts. You can also target grunts who are off-screen! There are a LOT of grunts in this level, so you should get this in about 3 playthroughs if you get them all each go. Combine with the Elite Minors Assault Op--jump out of the turret fast when you see an Elite.
  A-4a
  Stick To This!
  Kill 5 Elite Minors with Plasma Grenades
  Hard--Fast. For this one, jump into the Wraith, destroy the barrier, then proceed upwards on foot. You have the Speed Armor Ability so use it! There's one Elite close, and several more through the level. Try to get a sticky, otherwise they'll dodge. There are more plasmas near the start, go a little up, and on the right side where the Wraith tank won't fit, there are two grunts, two shields, and some plasmas. You can also find more plasmas through the level from dead enemies and some just south of the last AA Wraith. Combine with the next Assault Op.
  A-4b
  Burn Ward
  Kill 30 Grunt Minors with a Plasma Repeater
  Easy--Normal. You start with a Repeater. Like the last, use the Wraith to destroy the barrier, then proceed upwards on foot annihilating all Grunts with your Repeater. You can get more ammo for it from a weapons cache on the left side more than half-way through the level, and of course, dead Elites... combine with the previous Assault Op if you can.
  A-4c
  Wrath of the Wraith
  Destroy 15 Wraiths with a Wraith
  Very Easy--Fast. Jump in the Wraith, and go to town! This was fun, and there's really nothing to say, other than, make sure to keep dodging enemy wraith shots, and keep far enough away that their plasma gunner can't shoot. First time I played this level, I lost my Wraith. Last time I played the level, my Wraith ended with 75% health.
  A-5a
  Meatgrinder Mayhem
  Kill 15 Grunt Minors with a Machine Gun Turret
  Very Easy--Fast. The main turret you'll want to use is the one at the top of the Hornet landing pad. You can probably get all 15 Grunt Minors in one go. Remember though, the yellow ones are Grunt Minors, the white are Grunt Majors. If you don't get it all in one go at that turret, run around to the bottom turret, and go back and forth until you get it.
  A-5b
  Sting Like a Bee
  Destroy 4 Wraiths with a Magnum
  Very Hard--Slowest. There are 3 Wraiths that show up at the end of the mission. One Wraith shows up through the bottom barrier with one minute left, and two more come through the left and right barriers just after when the first countdown reaches zero. To destroy the Wraith with a Magnum though, you need to damage it first with something else down to about 3 bars or less. I recommend using a damage booster when going for this Assault Op. The best way to damage the Wraith is with Plasmas, they take it's health down very fast, and I believe two Plasmas take it's health down about 70-90%. The elites will jump out when it's at about 30% damage though and you can't tell how little health is left at that point because the health bar disappears. So, you could use Plasmas, sentry turrets work very well, or you could even hijack the Wraith and then get yourself shot up while watching the health bar. JUMP OUT before it gets destroyed though or you fail the mission! Either way you do it, Sentry Turrets and Grenades are the best, DO NOT USE the Magnum only, it will run out of ammo fast and I never found more Magnum ammo on the map. Even worse, there are only 3 Wraiths per playthrough and they are at the very end of the playthrough; so if you die, you have to restart and do the base defense all over again; and, there's a 25 second timer that starts once the base is defended so you have just a few seconds before the mission ends. 25 seconds to damage and destroy two more Wraiths with the Pistol.
  A-5c
  Stand-Off Shootout
  Kill 100 Covenant with the Shotgun
  Easy--Slow. Run around with your starting Shotgun blasting Grunts in the face! The grunts all die fast, there's more shotgun ammo above the base and in a weapon's cache on the left corner of the actual landing pad. It will take more than one playthrough, but kinda fun.
  
  
  B-1a
  Wave Breaker
  Kill 20 Suicide Grunts with a Machine Gun Turret
  Very Easy--Very Fast. Just jump on one of the Gun Turrets right outside the base and fire away! Grunts start coming right away, just make sure to get the Elites too.
  B-1b
  Ring of Fire
  Kill 30 Grunt Majors with an Incendiary Grenade
  Medium--Slow. You start with 3 Incendiary Grenades, and there are 3 more in a grenade box near the middle of the map. So, you have only 6 Grenades per try. Remember, you are going for the white Grunt Minors with the Incendiaries, and try to combine this with meleeing Suicide Grunts. You'll have to restart quite a few times to get your 30, at least 5 times or more.
  B-1c
  Power Punch-Out
  Kill 40 Suicide Grunts with a Melee Attack
  Easy--Medium. For this one, I'd recommend spending some XP on an Overshield bonus for this mission, as I did this without the overshield and kept dying from the suicide grenades. You'll probably have to restart the level a few times, but with an overshield bonus you can do this WAY faster than I did it. The Sprint Armor Ability pickup is useful if you don't use the Overshield Armor Ability though. It is located to the right side of the map, right next to the destroyed Wraith. If you use the Sprint ability, you can rush around the map, and if you're quick enough, you can even string a couple suicide melees together.
  B-2a
  Up Close and Personal
  Kill 20 Elite Minors with a Shotgun
  Normal--Easiest. You'll want to switch to a Shotgun at the start from the ammo crates. Also grab the Speed Armor Ability. Then, work on this one at the same time as the other two Assault Ops. There are enough Elites in the level to get this in one go, but don't worry about restarting or playing another as you work for all three Assault Ops. Elites go down in 1 or 2 Shotgun shots. There is more Shotgun ammo scattered through the level so don't worry about running out.
  B-2b
  Chain Reaction
  Kill 50 Suicide Grunts with SMGs
  Easiest--Medium. Very simple, just wait for the defense segments of the mission, and then lay into the Suicide Grunts with your SMGs. There are very many Suicide Grunts, so you could get this in one go probably(I died plenty being stupid with my shields down, lol), so had several go's at this. Quite fun.
  B-2c
  Burn Baby Burn!
  Kill 100 Covenant with Incendiary Grenades
  Easiest--Slow. This looks hard at first, but you can spawn camp the Covenant!! A max of 11 Incendiary Grenades(IG's) are in this mission. You start with 2 IG's, you'll want to pick up the 3 near the start, and then move to the first defense part. Watch where the Covenant are spawning through the barriers, and then throw 2 IG's, one to each spawn point, and watch the Covenant walk into the flame and burn up. When the flame dies out, make some more! When you run out of IG's, mop up this area, stock up on ammo, and move to the next defense portion picking up the 3 more IG's on the right side of the path when you're almost there. Repeat the same thing as before with the spawn points. When you run out of IG's, there are 3 more IG's on the path to the south starting below the Wolverines, along with a few Grunts. Pick those up, run back up top, and spawn camp some more. This will take a few retries of the mission to get all 100, but it's fun.
  B-3a
  Pincushion
  Kill 20 Jackals with a Needler
  Easiest--Normal. This is the easy Assault Op. Simply gun down a Jackal, take his Needler, and then shoot all the other Jackals with the Needler taking their Needler ammo as you go. You should be able to get this on your first run if you don't die. Combine with the other Assault Ops!
  B-3b
  Trigger Happy Demolition
  Destroy 10 Shade Turrets with the Shotgun
  Easy--Very Slow. Annoying Assault Op, there are only two Shade Turrets on the map. Simply throw one Frag Grenade at them then Shotgun them to pieces. Very quick once you get to the Turrets. Frags are better because the Grunts jump out after the grenade hits. There's one Turret up to the right and one Turret down to the left. I don't believe the Fuel Rod Turret counts for this. 5 restarts required minimum! Also, it seems like it sometimes doesn't count the Shotgun Turret kills.
  B-3c
  Catch!
  Kill 50 Grunt Majors with Grenades
  Normal--Very Slow. Another annoying one that requires restarts. The only Grunt Majors on the map are around the Gold Elites at the top right of the map. There are approximately 10 white Grunt Majors up there. You could die after killing them though to get quicker progress and to quickly restart the level.
  B-4a
  Clean-Up on Aisle Epsilon
  Kill 20 Grunt Majors with a Shotgun
  Easy--Slow. There is a Shotgun near the start of the bridge you need to cross, lying in front of some wreckage, in the middle of the bridge. There is also another Shotgun halfway across the bridge near the north side of the bridge. The white Grunt Majors are along the two paths up into the Mega Turrets. There are 8 on each run through, with 5 on the left path and 3 on the right so this will take a minimum of 3 run-throughs. They are very easy targets if you keep moving.
  B-4b
  Plasma Perimeter
  Kill 10 Elite Minors with a Shade Turret
  Normal--Medium. There are a few tricks to this. You can either do it using the Speed Armor Ability which is found at the very east barrier screen. Or, a very handy little trick is running close to a Grunt occupied Shade Turret, then throwing your default Armor Ability which is the Decoy. The enemies all shoot at it and you can just run up to a Shade and hit "X" to hijack it, then shoot the surrounding Elite(s). You'll have to repeat the mission a few times for this. Try to combine the Assault Ops here.
  B-4c
  Staring Death in the Eyes
  Kill 30 Elite Minors with a Wraith
  Easy--Slow. You need to be careful to not get blown up by the Mega Turrets while attacking in a Wraith. The only Elites in this mission are Elite Minors, so no worries there. There are quite a few Elites, at least 10 each time, so this should take 4-5 tries depending on how you kill the Elites. There are 3 Wraiths in the mission, two you can drive and one hijackable, but it's really not worth it if you can keep your Wraith alive. I'd also recommend just doing the first part repeatedly as the rest of the Elites are too far into the mission to make it worth while unless you're doing the other Assault Ops still. Basically, run to the first empty Wraith, kill all the Elites on the bridge, shoot the occupied Wraith past the bridge so the Elite jumps out then kill him, go up the left path past the Grunt Majors and get 2 more Elites up that path, then suicide or restart mission.
  B-5a
  Head On!
  Destroy 20 Wraiths with a Scorpion
  Easy--Medium. This will require at least 3 playthroughs because there are only 7 Wraiths each time. Really easy, basically blow up everything you can see. Really fun!
  B-5b
  Fight Vapor with Fire
  Destroy 30 Ghosts with a Scorpion
  Easy--Slow. This will require at least 5 playthroughs. I think there are only about 7 Ghosts each playthrough, and they are scattered all around the map. Just blow everything up, and combine this with the Wraiths.
  B-5c
  Back to the Grave
  Destroy 20 Wraiths with a Ghost
  Normal--Medium. This is fun, as the Ghost is so extremely powerful! I recommend either jumping out of the Scorpion at the start and using your Speed Armor Ability to get over to my favorite Ghost, all the way to the right side. It's occupied, but you can easily Speed Boost around it and hijack it with "X". Or, you can run the Scorpion that way, but DO NOT destroy the Wraith in your path. You'll want to take that out with the Ghost.
  
  
  C-1a
  Precision Disassembly
  Destroy 4 Shade Turrets with a Focus Rifle
  Easy--Slow. There are several Elite Majors in this mission. Take the Focus Rifle from the first one you see, and use it on the only Shade Turret in the mission. For a much easier time, hit the Turret with 1 Grenade of any type, then finish it off with the Focus Rifle. Minimum 4 playthroughs for this one Assault Op.
  C-1b
  Shooting Range
  Kill 50 Covenant using Rifles
  Very Easy--Medium. You start with a Rifle, and there are lots of easy covenant targets through the mission. You could even kill your teammates for more Rifle ammo. It's a really short mission also, so repeats quickly.
  C-1c
  Plasma Burn
  Kill 40 Covenant with Plasma Grenades
  Medium--Slow. This is an annoying Assault Op because you have to rely on grenade drops from Covenant since there are only 3 Plasma Grenades to pick up in the mission, over halfway through it on the north-west side of the main path. I discovered though that if you kill Elite Minors with grenade hits, they seem to more often drop plasmas, which you can then promptly hit some Grunts or Jackals with. Also, Elite Majors(red) always drop a Plasma. Quite luck based, it will take several playthroughs minimum, up to 10+ playthroughs.
  C-2a
  Explosive Apparation
  Destroy 5 Ghosts using Frag Grenades
  Normal--Medium. There are two Ghosts that appear during this mission, as part of the 3rd or 4th wave. Just make sure to have a Frag Grenade do the final damage to them, and you're good. You could always use a Plasma first then a Frag to make it easier. Minimum 3 playthroughs since there are only 2 Ghosts each time. One comes from the south-west, and one from the north. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. I also recommend the damage boost upgrade. Ghosts only take one Frag then.
  C-2b
  Moving Target
  Kill 40 Drones with an Assault Rifle
  Very Easy--Normal. There are a number of Drones that appear from the two holes several times during the mission. There are at least 20+ per playthrough. There are at least two Assault Rifles in the mission for pickups, one is to the far east along the path, and another is to the far west near the boxes. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. Recommended to use damage boost upgrade.
  C-2c
  Beam of Light
  Kill 80 Covenant with a Focus Rifle
  Very Easy--Normal. There are lots of Grunts and Elites in this mission. If you've already got your Assault Rifle challenge, then you can target the Drones also for more Covenant kills. I'd say you can get at least 30+ Covenant kills in one playthrough with the Focus Rifle. There are 3 Focus Rifle Pickups. One a little to the north next to some random clutter, one a little to the south just to the left of a big rock, and one more to the far west near the Assault Rifle. I highly recommend picking up the Speed Armor Ability right near where you start. Much better than what you start with. Recommended to use damage boost upgrade.
  C-3a
  A New Sheriff in Town
  Kill 20 Elite Minors with Pistols
  Medium--Fast. I verified that you can use the Magnum for these Elite Minors as well as the Elite Majors. *Chucklestyle discovered that the Needler counts as a pistol!--useful for saving all your Magnum for the Elite Majors!* *Special credit to Prestd for discovering a wonderful trick to get endless enemies to spawn quickly in this mission!!* "To get the enemies on mission C-3 to constantly spawn, you need to destroy the first 4 wraiths and then run to the end of the level, enemies including the Elite Majors will come pouring through the light wall." There is a Speed Armor Ability up the right side of the map, and you can use the Grenades scattered through the mission for the Wraiths. 2 Grenades for each AA Wraith, and 3-4 Grenades for each regular Wraith.
  C-3b
  Armed Ambush
  Destroy 10 Wraiths with a Machine Gun Turret
  Very Easy--Fast. There are quite a few Machine Gun Turrets scattered through the map. Combine this with the Speed Armor Ability, and you can just run from turret to turret destroying all the Wraiths quickly. Will take a couple playthroughs.
  C-3c
  Dirty Davis
  Kill 20 Elite Majors using a Magnum
  Medium--Medium. Thanks to Prestd, there is a great trick to get more Elite Majors to spawn! "To get the enemies on mission C-3 to constantly spawn, you need to destroy the first 4 wraiths and then run to the end of the level, enemies including the Elite Majors will come pouring through the light wall." There are also approximately 4-5 Elite Majors that will rush you once you've advanced about halfway up the map. I recommend using a Plasma overcharge to take down their shields, then a quick Magnum shot. Otherwise, it takes at least 5-6 Magnum shots to take them out. Don't forget to use the Speed Armor Ability, and also grab Grenades to help with the Wraiths.
  C-4a
  Razorback
  Kill 10 Elite Majors with a Needler
  Very Easy--Medium. There are 4-5 Elite Majors in this level, and they go down very quickly with a Needler. Combine and finish this Assault Op with one of the other two Assault Ops before focusing on the Stealth Elites. You can easily get more Needler ammo from the Jackals in this level, or the ammo crates.
  C-4b
  Guiding Light
  Kill 20 Stealth Elites with a Focus Rifle
  Very Easy--Fast. Once you have finished with the Elite Majors, you can start the level, kill the first two Stealth Elites, then Focus Rifle one of the explosive glowing objects and kill yourself. Reload the starting checkpoint, and repeat 10 times very quickly to get this Assault Op.
  C-4c
  Iron Fist
  Kill 20 Stealth Elites with Melee Attacks
  Very Easy--Fast. Once you have finished with the Elite Majors, you can start the level, kill the first two Stealth Elites, then Focus Rifle one of the explosive glowing objects and kill yourself. Reload the starting checkpoint, and repeat 10 times very quickly to get this Assault Op.
  C-5a
  Turn Off Their Lights
  Kill 10 Elite Majors with a Focus Rifle
  Very Easy--Very Fast. Found a better way. Save your Focus Rifle(pickup near the plasmas), use the damage upgrade. That way it takes far less to kill the Elite Majors, and you can pick up their ammo. Elite majors start rushing you when the countdown reaches 1:26 left. The Focus Rifle takes them down very quickly, and I was able to get all 10 in one go. Don't forget to run away from the action if your shields are down!
  C-5b
  Brutal Burnout
  Kill 5 Brute Chieftains with a Shade Turret
  Very Easy--Very Fast. To get this the fastest, simply run around at the start and kill the first 3 Grunt Minors, then run to one of the Shade Turrets and kill the Brute Chieftain who just spawned. Die, rinse, and repeat 4 more times.
  C-5c
  Special Delivery
  Kill 50 Drones with Plasma Grenades
  Very Hard--Very Slow. Extremely annoying, unless someone's figured out a trick for this. You have to stand far enough away so that your Plasmas land on the ground underneath where the Drones will be flying and shooting at the engineer. If you do it right, the blast radius will get some of the Drones at the same time. This will take many restarts or playthroughs. Figure on 6+ replays. There are approximately 10 Drones in 2 waves, and there are 3 Plasma Grenades to the left of where you start. Also, the Brute Chieftain drops another Plasma, and sometimes Grunts will drop Plasmas also. How I finished grinding mine out was this way: immediately as it starts, I went right, shotgunned the two Grunts, activated my speed boost, ran left and shotgunned the 3rd grunt. Then, Shotgunned the Brute Chieftain while picking up the other Plasmas, and grabbing the Plasma the Brute drops. From here, I positioned myself a little below the left lower gun cover near where the engineer works, and held the "LT" down so I could position my Plasmas exactly where I wanted. I found the best spot was just a little bit off center to the right, just above the engineer and still in the area behind the gun cover barricades. I also found that throwing the Plasmas when the Drones were not over that spot was best, as they usually flew over it just in time to get blown up. I managed to get a quad-kill with one Plasma this way, although that was very rare.
  
  
  D-1a
  All in a Day's Work
  Kill 20 Grunt Minors
  Very Easy--Very Fast. There can be literally hundreds of Grunts on this mission.. they will continually spawn out of the bottom left barrier and spawn faster as the countdown goes lower. Use your favorite weapon, and get this fast!
  D-1b
  Death From Above
  Kill 20 Jump-pack Brutes with a Brute Shot
  Very Easy--Fast. Simplest way to do this--wait on the starting platform before destroying the first barrier. Brutes will continually respawn, and you can just camp their landing sites. 2 hits with the Brute Shot will take them out, and they drop more ammo. Figure on one Brute every 7+ seconds, and you're done!
  D-1c
  Premature Detonation
  Kill 40 Suicide Grunts with a Focus Rifle
  Medium--Normal. This one is slightly tricky. Elite Majors only start spawning when the countdown reaches about 1 minute. At this point, Covenant start pouring through the south-west barrier rapidly, including Grunt Minors, Suicide Grunts, Elite Majors mainly, and some remaining Elite Minors. I recommend taking the Overshield Armor Ability for this mission(I took the Spartan Laser for the doors also), camp the barrier, and when the Elite Majors start spawning, activate
  your Overshield, swoop in, grab a Focus Rifle, then stand to one side and just continually fire the beam across the entrance. Elite Majors will charge you if you are close enough, and they'll simply drop more Focus Rifle ammo in front of you to pick up. I died quite a few times trying this, but finally was getting quite successful. If you want to finish the mission, make sure to start heading upwards with at least 10 seconds left assuming you already destroyed the armory door. You can rack up amazing points this way too. When I finally finished one of the missions I ended up with the 6th place overall score on the public leaderboards doing it this way!
  D-2a
  Who's Laughing Now!?
  Kill 10 Jackals with an Assault Rifle
  Very Easy--Very Fast. There is an Assault Rifle box straight ahead from where you spawn, against the south side of the rock wall that divides the two northern paths. There is also at least one more AR ammo box further through the mission. And, you just need to point at Jackals and pull the trigger. AR's take care of Jackals really fast. You can easily get 10 in one playthrough.
  D-2b
  Grapple Hook
  Kill 20 Jump-pack Brutes with a Needler
  Easy--Medium. The Jump-pack Brutes reinforce the Covenant attacks on the 3 outposts you need to protect and liberate. There are 2 Brutes at each outpost that 'drop' in, so you can get a max of 6 per playthrough. There are lots of Needler ammo pickups you can get from dead Jackals so not a problem, and Brutes go down quickly to Needler ammo.
  D-2c
  Anvil
  Kill 5 Brute Chieftains with a Brute Shot
  Easy--Medium. There is only one Chieftain per playthrough, and he spawns at the second outpost; so maybe play up to where he is, then die after taking out the Brutes and repeat making this not quite so slow. Just remember to use the Brute Shot on him, and collect more ammo from the Jump-pack Brutes.
  D-3a
  Bear Hug
  Destroy 10 Wraiths with a Grizzly Tank
  Very Easy--Fast. Most of the Wraiths are at the beginning of the mission. There are at least 5 at the start, and they are very easy to destroy with a Grizzly Tank--one shot fires two barrels and takes out a Wraith. Repeat the beginning twice, and you've got this Assault Op.
  D-3b
  Haunting
  Kill 20 Grunt Minors with a Ghost
  Very Easy--Fast. This can go even faster if you take the damage boost upgrade on the loadout screen. I recommend combining with the SMG Assault Op. You can easily get into a Ghost by using your default Decoy Armor Ability to distract the Ghost, running up, and pressing "X". There is a Ghost just after the first 5 Wraiths, right behind the first Shade Turret. There is also another you could hijack just a bit further north. From then on, especially with a damage boost, you can wipe everything out. You should be able to get a minimum of 10 Grunt Minors per playthrough.
  D-3c
  Drive By
  Destroy 20 Wraiths with SMGs
  Normal--Fast. The way I did this was I first destroyed my companion tanks at the start so they wouldn't shoot the Wraiths, then I used the secondary gun on the Grizzly to damage the Wraiths far enough to get the Elites to jump out. I proceeded to run over the Elites with my Grizzly, then jumped out and SMG'd the Wraiths. That's an easy way to get 5 right at the start, and there are at least 2 more during the mission that you could use your Grizzly or a Ghost to damage and repeat with the SMG. Minimum of 3 playthroughs.
  D-4a
  Molten Rain
  Kill 10 Elite Majors with a Plasma Repeater
  Easy--Fast. There are only about 5 Elite Majors that spawn in this mission. They all spawn as part of the Covenant that are chasing the Elephant across the bridge. Make sure to pick up a Plasma Repeater, and target the Red Elite Majors. The Blue Elites drop Plasma Repeaters just in case you didn't remember...
  D-4b
  Punctured Phalanx
  Kill 20 Jackals with SMGs
  Hard--Very Slow. The only Jackals in this mission spawn at the very end as the Elephant is going through the barrier to complete the mission. They spawn with groups of Suicide Grunts making it very hard to actually take out the Jackals before they get blown up. This will take multiple playthroughs, possibly up to 10 or more as you can hardly guarantee any Jackal kills. Using the Shock Armor Ability to freeze the Jackals and Grunts might help a little. I found at least 2 SMG pickups through the mission.
  D-4c
  Blast of Glory
  Kill 100 Suicide Grunts with a Plasma Pistol
  Very Easy--Slow. You start with a Plasma Pistol, and there are loads of Suicide Grunts to shoot at. I recommend the damage boost upgrade. Also remember that Drones also drop Plasma Pistols as you will run out of ammo. There are pretty much Suicide Grunts everywhere in this mission. It will take a couple playthroughs at least, but goes fairly quickly considering you have to get 100 kills!
  D-5a
  Is This Yours?
  Kill 20 Suicide Grunts with Incendiary Grenades
  Very Easy--Fast. Suicide Grunts will only come at you from the top left barrier near the start of the mission unfortunately, so you'll need to capitalize on the Suicide Grunts here. Once again, it's very helpful to throw Incendiary Grenades right next to the barrier to spawning Covenant automatically die in the flames. You start with 3 Incendiary Grenades, and there are 3 more in a grenade chest straight south of where you start, opposite the Elephant that was unloading the troops. You could get up to 6 or more each time through using all the grenades.
  D-5b
  Border Patrol
  Kill 100 Covenant with a Machine Gun Turret
  Very Easy--Very Fast. This is great fun, you have a MG Turret near the top, and one near the bottom. Just get on the gun and blast away! You should be able to do this in about 2 playthroughs.
  D-5c
  Hammer to a Gunfight
  Kill 10 Brute Chieftains with a Magnum
  Very Easy--Slow. There are only two Brute Chieftains per playthrough, and they both come from the north-west when defending the second group of escaping survivors. Chieftains go down easily, although I did have a damage upgrade equipped. With the damage upgrade Chieftains only took about 4 Magnum shots each. Once you kill the second Chieftain, the mission is almost over... and to get the next you you have to replay the whole mission back up to that point. Update!! I just got 3 Chieftains on my re-run of this achievement to unglitch it. I got two up the left side, and one more came from the bottom right near the second drop-ship!
  
  
  E-1a
  Blind Spot
  Kill 10 Drones with a Wraith
  Easy--Medium. There is only one Wraith in the mission, about halfway through. You need to either steal it with Invisibility on or just hijack it with Invisibility on. The only Drones you can get with the Wraith fly up out of the center hole in the map. -- Credit to Chucklestyle: you should be able to bait towards the wraith a group of 6 drones that fly out of the center hole, and if you avoid the Drones near mission start, you can get some of them as well. Should only take two runs through!
  E-1b
  Let It Rain!
  Kill 20 Stealth Elites with SMGs
  Easy--Medium. There are a lot of Stealth Elites in this mission, and you start with SMGs. I didn't find any other SMG ammo through the mission though, and I recommend you use the damage upgrade on the loadout screen. There are 2 Stealth Elites up the left side at the start, 2 more up the middle path, 2 more where the Wraith is(check the sides of the Wraith area), and at least 2 more at the final area. Should take at least 3 playthroughs.
  E-1c
  Come out of the Shade
  Destroy 10 Stealth Elites with a Shade Turret
  Hard--Slow. This one is very annoying, as you have to lead the Stealth Elites up to the Shade Turrets, and then shoot them before they run away. I had success getting at least one Stealth Elite each time using the Shade Turret just south of the Wraith, and at least two more Stealth Elites in the final area, using the closest Shade Turret. You can sit in that final Shade Turret and snipe the red squares off the screen. Just go by the map, and aim and shoot in the direction, and you should see your score go up when you get a hit. -- Credit to Chucklestyle, if this works as well as he said, it's a fantastic find! "You can bait the stealths and as long as you're not facing them they should follow you all around the level. I would head left from start and let the first one kill my team, then lure him up to the first turret. Make your way up to the 2nd turret, jump in it and waste everything with the turret, then you can lure at least a few more to this turret.
  E-2a
  Light at the End of the Tunnel
  Kill 20 Grunt Majors with a Focus Rifle
  Very Easy--Fast. Work on the Elite Majors Assault Op first, the others secondary. You start with a Focus Rifle, and there is unlimited ammo for it in a cache on the right side of the pathway. I recommend using the bonus damage upgrade to get the fastest possible kills. There are quite a few white Grunt Majors, and you should be able to get this in one playthrough.
  E-2b
  Scorched Earth
  Kill 10 Elite Majors using Incendiary Grenades
  Normal--Very Slow. The Elite Majors only show up close to the end of the mission, and you have only 3 Incendiary Grenades to start with. I wasn't able to find any other Incendiary Grenades either unfortunately. I had a very hard time actually targeting the Elite Majors with the Grenades. I usually missed at least one grenade hit, so it took me at least 5 playthroughs to get this. If you're very accurate, you could probably do this in 4 playthroughs.
  **Note thanks to Shinnizle!
  ""Just letting you know that near a (3) plasma grenade pickup on the left of the map, there is a Stun armor ability pickup. It proved very useful to me in making the Incendiary grenade kills on the Elite Majors. And shooting them a little first helps making sure they die by the grenade.""
  E-2c
  Fight Plasma with Plasma
  Kill 100 Grunts with a Plasma Pistol
  Very Easy--Slow. Work on the Elite Majors Assault Op first, the others secondary. The first Grunts will drop Plasma Pistols, and you can just keep killing grunts from then on easily. It will take a couple playthroughs at least though. I highly recommend the damage boost upgrade.
  E-3a
  All Charged Up
  Kill 30 Jackals with a Plasma Pistol
  Easy--Slow. Go north, stealth, kill a grunt, take his Plasma Pistol, and then proceed to use it against all the Jackals you can find. There will be quite a few, I'm guessing at least 20 Jackals per playthrough, however this just takes a long time to do.
  E-3b
  Dynamite Fishing
  Kill 50 Grunt Majors with Grenades
  Easy--Slow. You start with some grenades, and just run around picking up grenades and whenever you see a white Grunt Major use a grenade on him. You'll get this eventually around when you get the Jackal Assault Op.
  E-3c
  Stick Around!
  Kill 100 Covenant with a Needler
  Easy--Slow. Kill a Jackal, take his Needler, then Needle every enemy that isn't a Grunt Major or a Jackal, as you can work on all 3 Assault Ops at one time.
  E-4a
  Ghost Blaster
  Destroy 5 Ghosts using a Plasma Pistol
  Very Easy--Fast. There is a very very easy way of doing this. You start the mission with a Plasma Pistol and there is a parked Ghost straight north from the start. Just run up there, and overcharge the Ghost 3 times, die, and repeat 5 more times!
  E-4b
  Plasma Transfusion
  Destroy 10 Shade Turrets with a Ghost
  Easy--Medium. There is a Ghost straight up from the start, and there are at least 3 Shade Turrets you can take out with your Ghost during the mission. Just repeat several times and you'll get this quickly.
  E-4c
  Road Warrior
  Kill 50 Covenant with a Ghost
  Very Easy--Fast. Take the Ghost from the beginning of the mission and just kill everything with it. Very easy. You probably won't get 50 in one playthrough, but 2 should do it! Just watch out for Wraith shots.
  E-5a
  Rodent Removal
  Kill 10 Jackals
  Very Easy--Very Fast. Do not worry about this one, you'll get it at the same time as you kill Jackals with Brute Shot.
  E-5b
  Exterminator
  Kill 25 Elites with an Assault Rifle
  Easy--Fast. There is an Assault Rifle crate on the left side of the area. There are about 8 Elites that come through the mission, so you'll have to replay it about 5 times assuming you get all the Elites with an Assault Rifle.
  E-5c
  Perosus Latrunculus Exterminatus
  Kill 20 Jackals with a Brute Shot
  Very Easy--Fast. If you want to do this one extra fast, simple start the mission, take out the Jackals facing you with the Brute Shot, and then die, and restart.
  
  
  F-1a
  Ballistic Engineering
  Destroy 5 Shade Turrets with a Magnum
  Easy--Fast. I recommend the damage booster for this one. Use one grenade on the turrets, and then finish off with the Magnum. There are at least 4 Shade Turrets scattered around the area, and you could get this easily in two playthroughs. There is no more Magnum ammo though, so watch your supply.
  F-1b
  Plastered Purple
  Kill 20 Elites with Frag Grenades
  Normal--Slow. You start with 3 Frag Grenades, and that's it. You'll just need to be very accurate with the Elites, as I found the Frags missing often and the Elites also running away from them. Die and restart if this is your last Assault Op after you use your third Frag Grenade, and be careful you don't accidentally use your Frags instead of Plasmas!
  F-1c
  Carpet Bombing
  Kill 60 Covenant with a Brute Shot
  Very Easy--Fast. I recommend the damage booster so you can one-shot Brutes with the Brute Shot. Otherwise they are two shots. There happens to be unlimited Covenant and unlimited Brute Shot spawns in this mission. On the top left are of the map, where the Jump-pack Brute flies in, you can kill him and take his Brute Shot, and just keep killing Covenant and spawn killing the Brute for more ammo. Works great.
  F-2a
  Mauled to Death
  Destroy 10 Ghosts with a Grizzly Tank
  Very Easy--Medium. You start in a Grizzly! There are only about 3-4 ghosts per playthrough, and they are NO match for a Grizzly. Enjoy this mission. Just watch out for the Mega-turret shots as they can damage your Grizzly quite fast.
  F-2b
  Mine Field
  Kill 20 Suicide Grunts with a Scorpion Tank
  Easy--Slow. You start in a Grizzly! Jump out and get in the Scorpion just a bit farther up. There are not many Suicide Grunts in this mission, maybe a total of 8, and keeping the Scorpion tank alive can be challenging. Just be very careful about the Mega-Turret shots, Ghosts, and Wraiths and you should manage. It takes a while though. I highly recommend the damage boost upgrade to keep your Scorpion safer through offense! (updated starting tank thanks to | LUNCHTREY I )
  F-2c
  Beyond the Grave
  Kill 60 Covenant with a Ghost
  Easy--Medium. Quite fun. Head north until you see a Ghost, hijack it, and then melt everything with Plasma! Ghosts aren't invincible so use with care though, stay out of range, and do NOT get hit by the Mega-Turret shots.
  F-3a
  Voodoo Doll
  Kill 10 Jackals with a Needler
  Easy--Fast. You start with a Needler, and there are plenty of Jackals near the start. If necessary a second playthrough should easily get you this Assault Op.
  F-3b
  Puncture Burn
  Kill 30 Grunts with a Plasma Repeater
  Very Easy--Fast. You start with a Repeater--just use it on any Grunts you see, and you should have this one easily in two playthroughs. You could always restart after clearing out the first Grunts also.
  F-3c
  Explosive Arsenal
  Kill 60 Elites with Frag Grenades
  Hard--Very Slow. This is a stupid Assault Op. You start with 3 Frag Grenades, and there are no more. What I did was load up the mission, run straight for the first Elite ignoring all other Covenant, Frag him, if successful, run straight to the 2nd Elite who is further north and east, Frag him, if successful run to the last starting Elite who is at the far east barrier. As soon as I threw all 3 Frags and got my kills, I would restart the mission and repeat. It does count. Takes a minimum of 20 restarts, figure on closer to 40-50 restarts though because of grenade aiming and Elites moving.
  F-4a
  Great Balls of Plasma
  Kill 10 Elites with a Shade Turret
  Easy--Very Fast. The trick for this is to stealth and take over the Shade Turret at the far west shield generator, and then just camp in it shooting everything that comes.
  F-4b
  Slugger
  Kill 20 Stealth Elites with a Melee Attack
  Easy--Fast. I highly recommend the damage upgrade, because then the Stealth Elites are only two melees. There are a lot of them, at least 10 per playthrough, so just go through and melee them all. Two playthroughs should easily do it.
  F-4c
  Bug Fixer
  Kill 80 Drones with a Plasma Pistol
  Normal--Medium. My estimate on the total number of Drones for one playthrough is close to 30. They spawn out of the holes next to each path, and usually more will spawn after you complete an objective and then repass an area that you previously cleared. The best place for Drone killing is the shield generator on the right side, as a stream of about 12 Drones attacks at that objective. Just run around the paths and 3-4 Drones will spawn at a time. Then complete some objectives, more will spawn, etc.
  F-5a
  Rain of Pain
  Kill 20 Elites with a SMG
  Easy--Medium. Go for the Suicide Grunt Assault Op first! I highly recommend damage upgrade for this Assault Op. After finishing with the Suicide Grunts, go back to the start, gun the two Elite Majors down with your SMG, and immediately restart. Way faster than going through the mission!
  F-5b
  Return to Sender
  Kill 20 Suicide Grunts with Plasma Grenades
  Easy--Very Slow. Suicide Grunts are few and far between on this mission unfortunately. There might be a total of 5-6 per mission, so you will have to make multiple playthroughs. Fortunately there are LOTS of Plasma Grenades lying around. Take a Focus Rifle, unlimited ammo from the cache, and just gun down everything that isn't a Suicide Grunt.
  F-5c
  Laser Surgery
  Kill 40 Elites with a Focus Rifle
  Easy--Slow. Go for the Suicide Grunt Assault Op first! I highly recommend damage upgrade for this Assault Op. After finishing with the Suicide Grunts, go back to the start, run across the bridge, activate Speed Armor Ability as soon as you can, race to the Focus Rifle cache just on the left side of the big center hole, grab a Focus Rifle, gun down the two Elite Majors, and restart level. Repeat 20 times or fewer depending how many you got while going for Suicide Grunts. Way faster than going through the mission!

  Guide not helping? View 2 more guides for this achievement.

  Showing most recent comments. View all comments.

  My achievement unlocked with banner but didn't synch to xbox.com for whatever reason lol

  Posted on 26 Sep 21 at 18:24

  Incredible solution! Greatly appreciated.

  Posted by Ethigy on 26 Nov 21 at 07:49

  

  Posted by Shadow 00 Fox on 14 Apr 22 at 22:21

  Leave a comment

• Have you got any tips or tricks to unlock this achievement?
  Add a guide to share them with the community.

  Add a guide
• MR GABR1EL 95

  29 Apr 2018 28 Apr 2018 29 Apr 2018
  7 0 1

  Actions

  • Report Solution

  Just a tip.
  
  If you want to make this achievement for Xbox One, Xbox 360, Windows 8 or Windows Phone (In this case you need to choose Windows 8 or Windows Phone to do the challenges, in case you do all the challenges in Windows 8 and start the game in Windows Phone, the achievement will remain unobtainable, or contrariwise), you need to do all the first challenges in WP or Win8. You're going to ask me why? I'll tell you why, this achievement for WP or Win8, it is only necessary to do 75 challenges to the achievement. Already the version of Xbox One or Xbox 360, needs to do 90 challenges.
  
  In case you do all the challenges on Xbox One or Xbox 360 and start the game on Windows 8 or Windows Phone. This achievement will become Unobtainable. Because there are no more week challenges, which made the achievement possible.
  
  But if you do all the challenges on Windows 8 or Windows Phone. Yes, you can still do that on Xbox One or Xbox 360, because when you connect your account, you still need to do the rest of the challenges, which would be the 25 remaining.
  
  I made a video, and as I show in it, the achievement of doing all the challenges, appears with a percentage to be made.
  
  

  
  Second tip.
  
  I can confirm, if you have only 1 remaining challenge, you can win the achievement for both the Xbox One and Xbox 360. Basically you need to join on the missing map for your last challenge. You need to do this on both platforms, after you have join the match, I recommend doing it first on the Xbox 360 and then on the Xbox One. You can watch my video for no error.
  
  

  Showing only comment.

  Thanks! I got this done back in late June of 2019 and can confirm this does work and might be the only solution right now to getting this legit on all 4 devices until 343 decides to fix the cross-progression issue or if they add back Weekly Ops to the game.

  Posted by Fingergun112 on 05 Sep 19 at 16:10
• Erickson187

  20 Aug 2019 17 Dec 2018
  3 0 1

  Actions

  • Report Solution

  Possible glitch
  
  Not so much of a solution but some Advice to avoid possible loss of sync between different platforms. It seems if you play the 360 version on the Xbox one using the backwards compatibility then it loses sync with the Phone and PC. Also the stats you get while playing on the one using the BC do not update on the Halo Waypoint website which might cause an issue when trying to do the co op as well as campaign across multiple devices.
  　
  I would recommend that you play the game on the actual 360 and not on the one using the backwards compatibility.

  Showing only comment.

  Thanks for explaining the glitch! Tumbs up!

  Posted by MattiasAnderson on 29 Feb 20 at 15:53