- Chest of Gold
Halo 4: Complete a Halo 4 playlist.
- Chesty Puller Starter Kit
Collect 7,000 campaign or playlist medals.
- Cold Fusion
Halo 2A MP: Kill an opponent by detonating a Fusion Coil.
- Committed
Complete 350 missions or multiplayer games.
- Commuter
Halo 2: Complete Metropolis without entering a vehicle on Heroic or Legendary.
- Composer
Halo 4: Complete Composer.
- Connoisseur
Halo 2: Complete three Halo 2 playlists.
- Consumption Junction
Halo CE: Beat the par score on The Maw.
- Contender
Win 50 multiplayer games.
- Cool Story Bro
Halo 3: Listen to the story of the Final Grunt.
- Countdown
Halo 4: Beat the par time on Midnight.
- Counter-Sniped
Halo 2A MP: With a Sniper Rifle or Beam Rifle kill an enemy that was zoomed in.
- Cowardly Grunt
Halo 2: Listen to the Cowardly Grunt's woes.
- Cryptum
Halo 4: Activate Terminal 7 on Midnight.
- Curious
Halo 2: Activate Terminal 1 on Cairo Station.
- Dambuster
Halo 3: Beat the par time on Floodgate.
- Dankey Kang
Kill 1000 Brutes.
- Dark Fortress
Halo 4: Beat the par score on Requiem.
- Dawn
Halo 4: Complete Dawn.
- Dear Diary...
Halo CE: Activate all Halo: CE Terminals.
- Decorated Warrior
Halo 2A MP: Get awarded at least 10 different medals in one multiplayer game.
- Delicious Brains
Kill 100 Flood.
- Delighted
Halo 2: Activate Terminal 9 on Quarantine Zone.
- Delta Halo
Halo 2: Complete Delta Halo.
- Demon
Halo 2: Complete any campaign level without dying on Normal or harder.
- Destination Vacation
Halo 2: View one of the seasonal signs on Zanzibar in classic multiplayer.
- Determined
Halo 2: Activate Terminal 8 on Sacred Icon.
- Devastating
Halo 3: Complete all Halo 3 Legendary campaign missions in under 3 hours.
- Devotee
Halo 4: Complete three Halo 4 playlists.
- Did Somebody Say...
Halo CE: Beat par time on all Halo: CE levels.
- Chief, Smash!
Halo 4: Kill 3 Crawlers in one hit with the Gravity Hammer on Midnight.
- Chieftain of the Brutes
Halo 2: Collect the Tartarus toy in Quarantine Zone.
- Circuit Breaker
Halo CE: Beat the par score on 343 Guilty Spark.
- Citadel Skull
Halo 3: Find the hidden Skull on the Citadel multiplayer map.
- Cleansing
Halo 3: Complete Floodgate.
- Close Quarters Combat
Halo CE: Complete The Truth and Reconciliation with at least four rounds left in your Sniper Rifle.
- Cold as Ice
Halo 2A MP: On Lockdown, kill an opponent with the hanging ice.
- Waypoint
Halo 3: Beat the par time on The Ark.
- Were It So Easy
Kill 1000 Elites.
- Wetwork
Halo 2A MP: On Shrine in CTF, activate the enemy base waterfall and, before it stops, grab the flag.
- Where Am I?
Complete 10 missions or multiplayer games.
- Didn't Like This Ship Anyways
Halo CE: Beat the par time on The Pillar of Autumn.
- Digging up the Past
Halo 4: Access the Master Chief's records on Dawn.
- Dim Mak
Earn a total of 250 Beat Down medals in multiplayer.
- Dirge of Madrigal
Halo 3: Trigger the hidden music cue in Halo 3.
- Dirty Bird
Halo 2: Fly the Heretic Banshee.
- Dogcatcher
Kill 1000 Crawlers.
- Domination
Earn a total of 100 Legendary medals in matchmade games.
- Don't Hangar Around
Halo 2: Beat the par time on Cairo Station.
- Don't Make a Girl a Promise
Halo 2: Collect the Cortana toy in Gravemind.
- Double Down
Halo 2A MP: In Anniversary multiplayer, receive 2 or more Double Kill medals.
- Double Trouble
Earn a total of 250 Double Kill medals in matchmade games.
- E E E
Halo 2: View both signs in the level Metropolis.
- Whispers Across the Galaxy
Halo 3: View the communique from Mendicant Bias.
- Easy As One Two Three
Halo 4: Beat the par time on all Halo 4 levels.
- Whistle Stop Tour
Halo CE: Beat the par time on Two Betrayals.
- Who Needs Them?
Halo 3: On The Ark, complete the level without entering a vehicle on Legendary.
- Elder Signs
Halo 3: View 2 different sigils on Valhalla.
- Why Am I Here?
Halo 2: View this hidden message on the classic Beaver Creek map.
- Why So Serious
Halo 2: View the smiling face in the classic multiplayer map Coagulation.
- Window Shopping
Halo 2: Complete a match on at least 4 different game types in classic multiplayer.
- Emergency Shutdown
Halo 4: Beat the par score on Shutdown.
- Witch Doctor
Halo 3: Find and claim all Skulls in Halo 3.
- Eminent Domain
Halo 2A MP: In Territories, control any 3 Territories simultaneously for 30 seconds.
- Witching Hour
Halo 4: Beat the par score on Midnight.
- With Your Shield or On It
Halo 3: Complete every level of the game on Heroic difficulty.
- World Traveler
Halo 3: Complete a match on at least 8 different multiplayer maps.
- Enamored
Halo 2: Activate Terminal 7 on Regret.
- Enchanted
Halo 2: Activate Terminal 6 on Delta Halo.
- Worship Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Shrine.
- Examiner
Halo 2: Activate Terminal 3 on Metropolis.
- Would It've Killed You To Take The Elevator
Halo CE: Beat the par time on Assault on the Control Room.
- Excellent Taste
Halo CE: Complete three Halo: CE playlists.
- Wraith Hunter
Halo CE: Destroy four Wraith tanks in Assault on the Control Room with the Scorpion tank.
- Wyrmslayer
Kill 250 Hunters.
- YOLO Strats
Halo 2: Beat the par time on The Arbiter.
- You Are The Weapon
Halo CE: Kill a Hunter with one pistol round.
- You Can't Handle the Truth
Halo CE: Beat the par time on The Truth and Reconciliation.
- Explore the Floor
Halo 4: Trick or force a Hunter to fall to its demise on Shutdown on Heroic or Legendary.
- You Had it Coming
Halo 4: Beat the par score on every Halo 4 level.
- Exterminator
Halo 3: Beat the par score on Floodgate.
- Fascinated
Halo 2: Activate Terminal 5 on The Oracle.
- Feeling Charitable
Halo 2: Beat the par time on High Charity.
- Feet Firmly Planted
Halo CE: Complete a level without jumping.
- Finished the Fight
Halo 3: Complete every level of the game on Legendary difficulty.
- You Really Can't Handle the Truth
Halo CE: Beat the par score on The Truth and Reconciliation.
- Fists of Fury
Halo 2: Beat the par score on Regret.
- Flaming Ninja Anniversary
Halo 2A MP: Kill an opponent that has the Ninja Redux achievement in Anniversary matchmaking.
- Flipyap
Halo 3: Listen to the tale of a young Grunt named Flipyap.
- Your Journey Begins
Complete a campaign mission or a match of multiplayer.
- Flood
Halo 4: Activate Terminal 4 on Reclaimer.
- You're Joking
Halo 4: Complete all Halo 4 Legendary campaign missions in under 3 hours.
- You're No Chips
Halo 4: What do Marines know about sticks?
- Zealot
Halo 2A MP: In Anniversary matchmaking, win 10 games as an Elite.
- Flyover Country
Halo CE: Beat the par time on Halo.
- Foe Hammer
Kill 5,000 enemies or players.
- Force of Will
Halo 2: Beat the par time on Gravemind.
- Forerunner
Halo 4: Complete Forerunner.
- Forged in Fire
Win 100 multiplayer games.
- Frequent Flyer Miles
Halo 2: Beat the par score on The Great Journey.
- Zombie Repeller
Kill 1000 Flood.
- Game Master
Created and saved 5 Custom Game types.
- Game On
Complete 50 missions or multiplayer games.
- Gate Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Stonetown.
- Get Me Out of Here!
Halo CE: Ride in a Pelican for several seconds on the level 343 Guilty Spark.
- Giant Hula Hoop
Halo CE: Beat the par score on Halo.
- Gimme That
Halo 4: Beat the par time on Reclaimer.
- Give Him the Stick
Halo 4: Take out both Hunters using only the Sticky Detonator on Composer.
- Go Ape Shiv
Halo 2: Kill an enraged, berserk Brute using melee.
- Go, Chief! Gun It!
Halo 3: Beat the par time on Halo.
- Goat Roped
Halo CE: Halo CE: Complete all Halo: CE Legendary campaign missions in under 3 hours.
- Going Bananas
Kill 100 Brutes.
- Going International
Halo 4: Complete a match on at least 8 different multiplayer maps.
- Going Nowhere Fast
Halo 2: Beat par time on all Halo 2 levels.
- GOOOAAAAALLLL!
Halo 2: Shoot the soccer ball in the level Metropolis.
- Grand Theft Halo
Halo 2A MP: In one match, steal a total of 5 occupied vehicles from opponents.
- Gravemind
Halo 2: Complete Gravemind.
- Greenhorn
Halo CE: Complete every level of the game on Easy difficulty.
- Gruntageddon
Kill 1000 Grunts.
- Top Gungoose
Halo 2A MP: Get a kill with the Gungoose while airborne.
- Torchbearer
Halo 3: Beat the par score on Halo.
- Tour of Duty
Halo 2A MP: Complete a game in every one of the 6 updated Anniversary MP maps.
- Tourist
Halo 2: Complete a match on at least 8 different classic multiplayer maps.
- Toybox
Halo 2: Collect all eight Halo toys.
- Training Wheels
Halo 3: Complete every level of the game on Easy difficulty.
- T-Rex
Halo CE: Find the hidden Rex sign on The Maw.
- Triple Threat
Halo 2A MP: In Ricochet, pass once, score once, and kill at least one enemy in the same match.
- Trophy Collector
Halo 2: Find and claim all Skulls in Halo 2.
- Truth and Reconciliation
Halo CE: Complete The Truth and Reconciliation.
- Two Betrayals
Halo CE: Complete Two Betrayals.
- Tying Up Loose Ends
Halo CE: Kill every Elite on the level Keyes on Heroic or Legendary difficulty.
- Unto Dust
Halo 3: Activate Terminal 5 on The Covenant.
- Up All Night
Complete 250 missions or multiplayer games.
- Guerilla
Halo 3: Beat the par score on Sierra 117.
- Uprising
Halo 2: Complete Uprising.
- Vanguard
Halo 3: Beat the par score on The Covenant.
- Veteran
Complete all campaigns on Normal difficulty.
- Guided Tour
Halo 2: Beat the par score on Sacred Icon.
- Gunslinger
Halo 4: Beat the par score on Dawn.
- Vetro Strike
Halo CE: Beat the par score on Assault on the Control Room.
- Wake Up, John
Halo 4: Complete every level of the game on Normal difficulty.
- Halo
Halo CE: Complete Halo.
- Haplorrhini
Halo 3: Find a lonely missing link.
- He Never Gets Me Anything
Halo 2: Complete Delta Halo without entering a vehicle on Heroic or Legendary.
- Head Banging
Halo 4: Beat the par score on Composer.
- Headhunter
Halo CE: Find and claim all Skulls in Halo: CE.
- Heading to his Destiny
Halo 3: Destined for greatness.
- Headstrong
Halo CE: Beat the par score on Keyes.
- Herald of the Reclamation
Complete all campaigns on Easy difficulty.
- Heresy Will Not Stay My Feet
Halo 2: Beat the par score on The Arbiter.
- Heretic Skull
Halo 3: Find the hidden Skull on the Heretic multiplayer map.
- Hero
Halo 2: Complete every level of the game on Heroic difficulty.
- He's Running a Marathon...
Halo 2: Spot the developer in the opening cutscene of Gravemind on Legendary in Classic Mode.
- He's Unstoppable
Halo CE: Complete any level on Heroic difficulty or higher without taking health damage.
- HI BEN
Halo 2: Oh, hi!
- High Altitude Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Zenith.
- High Charity
Halo 2: Complete High Charity.
- Highway Robbery
Halo 3: Beat the par time on Tsavo Highway.
- Hippo Hero
Halo 3: Who DARED to discard this brave animal?
- Hit The Beach
Halo CE: Beat the par time on The Silent Cartographer.
- Hitchhikers May Be Escaping Convicts
Halo CE: Activate Terminal 5 on Assault on the Control Room.
- Holdout
Halo 3: Complete Crow's Nest.
- Hot Zone
Halo 2: Beat the par time on Quarantine Zone.
- How Pedestrian
Halo CE: Complete Halo without entering a vehicle.
- Hunters Hunted
Kill 50 Hunters.
- I Dabble in Slaying
Complete one cross-game playlist.
- I Got This
Complete 100 missions or multiplayer games.
- Walk It Off
Halo CE: Complete The Pillar of Autumn on Legendary without picking up a health kit.
- Walking Encyclopedia
Halo 2: Activate all Halo 2 Terminals.
- War
Halo 4: Activate Terminal 1 on Requiem.
- I Like Crazy
Halo 2: Collect the Rampant Cortana toy in High Charity.
- I Need a Hero
Halo 4: Complete every level of the game on Heroic difficulty.
- War Hero
Complete all campaigns on Heroic difficulty.
- I Regret Nothing
Halo 2: Beat the par time on Regret.
- I Was Wondering What Would Break First
Kill 100 Knights.
- Idle Hands
Halo CE: Activate Terminal 4 on The Silent Cartographer.
- In It To Win It
Win 200 multiplayer games.
- Infinity
Halo 4: Complete Infinity.
- Inquisitive
Halo 2: Activate Terminal 2 on Outskirts.
- Inspector
Halo 2: Activate Terminal 4 on The Arbiter.
- Interloper
Halo 4: Beat the par time on Requiem.
- Inundation
Halo 3: Activate Terminal 2 on The Ark.
- Invaders Repelled
Halo 2A MP: In King of the Hill, kill 5 opponents within your controlled hill.
- It Was Inevitable
Halo CE: Beat the par score on Two Betrayals.
- Warden
Halo 2 MP: In Classic or Anniversary matchmaking, stop the killing spree of another player.
- Jungle Warfare
Halo 4: Beat the par score on Infinity.
- Just A Taste
Collect 500 campaign or playlist medals.
- Just Browsing
Halo 3: Complete a match on at least 4 different game types in multiplayer.
- Just Getting Started
Kill 100 enemies or players.
- Justice
Halo 4: Activate Terminal 6 on Composer.
- Keyes
Halo CE: Complete Keyes.
- Kilotons of Fun
Halo CE: Activate Terminal 10 on The Maw.
- King of the Crows
Halo 3: Beat the par score on Crow's Nest.
- Knightbane
Kill 1000 Knights.
- Knights
Halo 4: Activate Terminal 5 on Shutdown.
- Knowledgable
Halo 2: Activate Terminal 10 on Gravemind.
- Landfall
Halo 3: Complete Sierra 117.
- LASO Master
Complete each individual game specific LASO playlist for every Halo game.
- Warrior
Halo 2: Complete every level of the game on Normal difficulty.
- The Great Journey
Halo 2: Complete The Great Journey.
- The Guardians Are Coming
Get killed by the Guardians.
- The Hype Is Real
Halo 2: Beat the par score on Uprising.
- The Key
Halo 3: Complete Cortana.
- The Legend of 117
Halo 4: Complete every level of the game on Legendary difficulty.
- The Library
Halo CE: Complete The Library.
- The Long Haul
Complete 500 missions or multiplayer games.
- The Maw
Halo CE: Complete The Maw.
- The One Percent
Kill 100 Elites.
- The Return of Megg
Halo 2: She's not picking up.
- The Road
Halo 3: Complete Tsavo Highway.
- The Silent Cartographer
Halo CE: Complete The Silent Cartographer.
- Last Stand
Halo 3: Complete The Covenant.
- Leave It Where It Lay
Halo CE: Complete Two Betrayals on Legendary difficulty without picking up a new weapon.
- Leave None Alive
Halo 2: Beat the par score on The Oracle.
- The True King
Earn a total of 250 KOTH Mode Specific medals in matchmade games.
- The Will of the Prophets
Halo 2: Collect the Arbiter toy in Sacred Icon.
- Thermopylae
Win 300 multiplayer games.
- Third Time's A Charm
Halo 3: Play a game of Halo 3 on the 25th of any month.
- Thirst Locked Down!
Halo 2A MP: Found and destroyed the BLAST soda can on Lockdown.
- Thirsty Grunt
Halo CE: Listen to the Thirsty Grunt talk about his eating habits.
- This is my Rifle, This is my Gun
Halo 4: Carry a UNSC weapon all the way through Forerunner on Heroic or Legendary.
- This Side Up
Halo CE: Complete the Warthog ride of The Maw without being forcibly ejected from your vehicle.
- Throne of Bones
Find and claim all the campaign skulls in Halo:CE, Halo 2, and Halo 3.
- Legend
Complete all campaigns on Legendary difficulty.
- Tighten Up The Graphics
Halo 2: Complete every level of Halo 2 having seen it in both classic and remastered mode.
- Legend Slayer
Halo 2A MP: Kill an opponent that has the Legendary Anniversary achievement.
- Time Shift
Halo 3: Beat the par time on Crow's Nest.
- Legendary Anniversary
Halo 2: Complete every level of the game on Legendary difficulty.
- Tipping Point
Halo 3: Activate Terminal 4 on The Covenant.
- TLDR
Halo CE: Beat the par time on The Library.
- Speeding Ticket
Halo 2: Beat the par time on Metropolis.
- Speedy One One Seven
Halo 3: Beat the par time on Sierra 117.
- Splinters
Halo CE: Activate Terminal 3 on The Truth and Reconciliation.
- Librarian's Gift
Halo 4: Complete every level of the game on Easy difficulty.
- Spoilsport
Kill 100 Jackals.
- Spree Master
Earn a total of 100 Killing Spree medals in matchmade games.
- Standard Operating Brocedure
Complete any co-op level on Normal difficulty.
- Starved For Shields
Halo 2: Complete a level with only the Streaking Skull active on Heroic or Legendary.
- Stayin' Alive
Halo 2A MP: In Juggernaut, survive as the Juggernaut for 30 seconds.
- Steady Aim
Win 400 multiplayer games.
- Stick With It...A Little Longer
Play a multiplayer or co-op game at least 3 months after your first game.
- Striking Fear in Their Hearts
Win 350 multiplayer games.
- Sword and Shield
Halo 3: Activate Terminal 7 on Halo.
- Symphony of Pain
Halo 4: Beat the par time on Composer.
- Taste Test
Halo 4: Complete a match on at least 4 different game types in multiplayer.
- Librarian's Pet
Halo 4: Beat the par score on Reclaimer.
- Tempered Blade
Win 10 multiplayer games.
- Terminal Velocity
Halo 2: Beat the par time on Sacred Icon.
- Life Story
Complete the Master Chief Saga playlist.
- Terminus
Halo 4: Activate all Halo 4 Terminals.
- Lightning in a Bottle
Halo CE: Beat the par time on 343 Guilty Spark.
- Lightning Strike
Halo 3: Beat the par time on The Storm.
- Thanks A Killion
Kill 20,000 enemies or players.
- Like a Fine Wine
Halo CE: Complete the Halo: CE LASO Campaign playlist.
- That Just Happened
Halo CE: Complete The Library on Heroic or Legendary difficulty without dying.
- Like Peanut Butter and Chocolate
Halo 2: Complete a level in co-op on Heroic or Legendary with the Masterblaster Skull active.
- Living Legend
Halo CE: Complete every level of the game on Legendary difficulty.
- The Arbiter
Halo 2: Complete The Arbiter.
- Lone Wolf Legend
Halo 4: Complete every level of the game on Legendary difficulty, by yourself.
- THE Chips Dubbo?
Halo 2: Fight alongside the legendary Chips Dubbo and listen to his words.
- The Coin's Fault
Halo 3: Activate Cortana's Terminal on Cortana.
- Long Time Fan
Complete 450 missions or multiplayer games.
- The Doctor Is In
Halo 2: Beat the par score on Quarantine Zone.
- The Good, The Bad, and The Dead
Collect 9,000 campaign or playlist medals.
- Longshore Skull
Halo 3: Find the hidden Skull on the Longshore multilayer map.
- Look Out for the Little Guys
Halo CE: Complete Two Betrayals on Legendary difficulty without killing any Grunts.
- Lord of Admirals
Halo 4: Activate Terminal 2 on Forerunner.
- Lore Master
Activate all terminals.
- The Goose is Loose
Halo 2A MP: Get 25 kills with the Gungoose in multiplayer.
- Madrigal Debut
Halo CE: Trigger a hidden music cue in Halo: CE.
- Skulltaker Halo 2: Famine
Halo 2: Find and claim the Famine Skull on Legendary.
- Skulltaker Halo 2: Ghost
Halo 2: Find and claim the Ghost Skull on Legendary.
- Skulltaker Halo 2: Grunt Birthday Party
Halo 2: Find and claim the Grunt Birthday Party Skull on Legendary.
- Making History
Halo 3: Beat the par time on Cortana.
- Skulltaker Halo 2: Iron
Halo 2: Find and claim the Iron Skull on Legendary.
- Man on the Moon
Halo 3: He's watching you.
- Master Forger
Created and saved 5 Custom Maps in Forge.
- Skulltaker Halo 2: IWHBYD
Halo 2: Find and claim the IWHBYD Skull on Legendary.
- Medal Completionist
Collect 10,000 campaign or playlist medals.
- Skulltaker Halo 2: Mythic
Halo 2: Find and claim the Mythic Skull on Legendary.
- Skulltaker Halo 2: Sputnik
Halo 2: Find and claim the Sputnik Skull on Legendary.
- Skulltaker Halo 2: That's Just…Wrong
Halo 2: Find and claim the That's Just...Wrong Skull on Legendary.
- Skulltaker Halo 2: Thunderstorm
Halo 2: Find and claim the Thunderstorm Skull on Legendary.
- Skulltaker Halo 3: Black Eye
Halo 3: Find and claim the Black Eye Skull on Normal or harder.
- Medal Master Chief
Collect 8,000 campaign or playlist medals.
- Skulltaker Halo 3: Blind
Halo 3: Find and claim the Blind Skull on Normal or harder.
- Skulltaker Halo 3: Catch
Halo 3: Find and claim the Catch Skull on Normal or harder.
- Skulltaker Halo 3: Cowbell
Halo 3: Find and claim the Cowbell Skull on Normal or harder.
- Skulltaker Halo 3: Famine
Halo 3: Find and claim the Famine Skull on Normal or harder.
- Skulltaker Halo 3: Fog
Halo 3: Find and claim the Fog Skull on Normal or harder.
- Skulltaker Halo 3: Grunt Birthday Party
Halo 3: Find and claim the Grunt Birthday Party Skull on Normal or harder.
- Skulltaker Halo 3: Iron
Halo 3: Find and claim the Iron Skull on Normal or harder.
- Skulltaker Halo 3: IWHBYD
Halo 3: Find and claim the IWHBYD Skull on Normal or harder.
- Skulltaker Halo 3: Mythic
Halo 3: Find and claim the Mythic Skull on Normal or harder.
- Skulltaker Halo 3: Thunderstorm
Halo 3: Find and claim the Thunderstorm Skull on Normal or harder.
- Skulltaker Halo 3: Tilt
Halo 3: Find and claim the Tilt Skull on Normal or harder.
- Skulltaker Halo 3: Tough Luck
Halo 3: Find and claim the Tough Luck Skull on Normal or harder.
- Skulltaker Halo: CE: Bandana
Halo CE: Find and claim the Bandanna skull in remastered mode.
- Skulltaker Halo: CE: Black Eye
Halo CE: Find and claim the Black Eye skull in remastered mode.
- Skulltaker Halo: CE: Boom
Halo CE: Find and claim the Boom skull in remastered mode.
- Skulltaker Halo: CE: Eye Patch
Halo CE: Find and claim the Eye Patch skull in remastered mode.
- Skulltaker Halo: CE: Famine
Halo CE: Find and claim the Famine skull in remastered mode.
- Skulltaker Halo: CE: Fog
Halo CE: Find and claim the Fog skull in remastered mode.
- Skulltaker Halo: CE: Foreign
Halo CE: Find and claim the Foreign skull in remastered mode.
- Skulltaker Halo: CE: Grunt Birthday Party
Halo CE: Find and claim the Grunt Birthday Party skull in remastered mode.
- Skulltaker Halo: CE: Iron
Halo CE: Find and claim the Iron skull in remastered mode.
- Skulltaker Halo: CE: Malfunction
Halo CE: Find and claim the Malfunction skull in remastered mode.
- Skulltaker Halo: CE: Mythic
Halo CE: Find and claim the Mythic skull in remastered mode.
- Skulltaker Halo: CE: Pinata
Halo CE: Find and claim the Pinata skull in remastered mode.
- Skulltaker Halo: CE: Recession
Halo CE: Find and claim the Recession skull in remastered mode.
- So You Don't Want the Tank?
Halo 2: Beat the par time on Delta Halo.
- Sid Graffiti
Halo 2: Spot the Sid graffiti on the walls of Coagulation in classic multiplayer.
- Siege of Ivory Tower
Halo 2: Listen to a hidden music cue in Halo 2.
- Sightseeing
Halo CE: Complete a match on at least 8 different classic multiplayer maps.
- Silent but Deadly
Halo 2: Kill 7 opponents from behind in a row without being spotted.
- Six Pedals, Four Directions
Halo 2: Drive a Scorpion while playing as the Arbiter.
- Skeet Shooter
Halo 2A MP: Killed 15 opponents that were airborne from a Man Cannon.
- Skulltaker Halo 2: Anger
Halo 2: Find and claim the Anger Skull on Legendary.
- Skulltaker Halo 2: Assassins
Halo 2: Find and claim the Assassins Skull on Legendary.
- Skulltaker Halo 2: Black Eye
Halo 2: Find and claim the Black Eye Skull on Legendary.
- Skulltaker Halo 2: Blind
Halo 2: Find and claim the Blind Skull.
- Skulltaker Halo 2: Catch
Halo 2: Find and claim the Catch Skull on Legendary.
- Skulltaker Halo 2: Envy
Halo 2: Find and claim the Envy Skull on Legendary.
- Phantom Hunter
Halo 3: Destroy 3 total Phantoms on The Covenant.
- Piece of Cake
Halo 4: Beat the par time on Dawn.
- Pillar of Autumn
Halo CE: Complete The Pillar of Autumn.
- Pillar of Awesome
Halo CE: Beat the par score on The Pillar of Autumn.
- Planting A Flag
Earn a total of 250 CTF Mode Specific medals in matchmade games.
- Power Play
Halo 2A MP: On Warlord, get 5 active camouflage power ups in a single game.
- Primate
Halo 3: Find your first missing links.
- Prophet's Bane
Halo 3: Complete every level of the game on Normal difficulty.
- Put Up Your Dukes
Halo 2A MP: Get 25 melee kills in multiplayer.
- Pyrrhic Solution
Halo 2: Collect the Didact toy in The Great Journey.
- Quarantine Zone
Halo 2: Complete Quarantine Zone.
- Quick Trigger Finger
Win 450 multiplayer games.
- Quis custodiet ipsos custodes?
Halo CE: Activate Terminal 7 on The Library.
- Raging in the Dark
Halo 4: Beat the par time on Forerunner.
- Ranger
Halo 3: Beat the par score on The Ark.
- Reading Room
Halo CE: Beat the par score on The Library.
- Reclaimer
Halo 4: Complete Reclaimer.
- Red vs. Blue
Halo 2A MP: Win 10 matches on Bloodline in multiplayer.
- Reed the Strategy
Halo 2: Beat the par time on The Oracle.
- Refuge
Halo 3: Complete The Ark.
- Regret
Halo 2: Complete Regret.
- Regrettable Turn of Events
Halo 2: Collect the Prophet of Regret toy in Regret.
- Remove the Bishops From the Board
Kill 1000 Watchers.
- Requiem
Halo 4: Complete Requiem.
- Return
Halo 3: Complete Halo.
- Megg
Halo CE: It's a sign.
- Memories
Halo CE: Activate Terminal 8 on Two Betrayals.
- Metropolis
Halo 2: Complete Metropolis.
- Midnight
Halo 4: Complete Midnight.
- Milk Carton
Halo 3: Find the poster of the missing man.
- Mind Games
Halo CE: Activate Terminal 9 on Keyes.
- Mind the Gap
Halo 3: 4 vehicles, 1 gap on Legendary using Cowbell, Catch, Thunderstorm, Mythic, and Tough Luck.
- My Work is Done
Halo 2: Collect the Librarian toy in Uprising.
- Mystery Achievement
Inscrutable. Mysterious.
- Missing Link
Halo 3: Watching. Waiting. Plotting.
- Monopolized
Halo 2: Complete all Halo 2 Legendary campaign missions in under 3 hours.
- Mortardom
Halo 4: On Reclaimer, use a Wraith to kill at least four enemy Wraiths on Heroic or Legendary.
- Multiplayer Champion
Win 500 multiplayer games.
2 guides
- MVP
Halo 2A MP: Finished as the top player on the winning team in a matchmade game.
- Naked Tyrant
Halo 4: Complete the Halo 4 LASO Campaign playlist.
- My Buddy Chips
Halo CE: Fight alongside Chips Dubbo and listen to his words of wisdom.
- Needs More Whammy Bar
Halo 2: Complete the level Regret with the Prophet Birthday Skull activated.
- Reviewer
Halo 2: Activate Terminal 12 on High Charity.
- Nice Work Dawg!
Earn a total of 2,500 Assist medals in multiplayer.
- Ninja Redux
Halo 2A MP: Kill 5 people with melee from behind in Anniversary matchmaking.
- No Man's Land
Halo 2: Beat the par time on Uprising.
- No Pain, No Gain
Complete 1 mission with the LASO playlist skulls enabled.
- Rex Sword
Halo 2: Grab the energy sword on the level Outskirts.
- Ripple Fire
Halo 2: Beat the par score on Metropolis.
- Rising Waters
Halo 3: Activate Terminal 1 on The Ark.
- Roadkill Rampage
Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Splatter medals.
- Rock and Coil Hit Back
Halo 2A MP: In Anniversary matchmaking, earn a total of 100 Environmentalist medals.
- Rooftop Runner
Halo 2: Beat the par time on Outskirts.
- Rule Your Thirst!
Halo 2A MP: Found and destroyed the BLAST soda can on Warlord.
- No Smoking
Halo CE: Disapprovingly look at Captain Keyes' abandoned pipe.
- No Stone Unturned
Halo 3: Activate all Halo 3 Terminals.
- No-Fly Zone
Halo CE: Destroy three of the four Banshees on Halo during a single play-through.
- Objective Secured
Halo 2: Beat the par score on Outskirts.
- Sacred Icon
Halo 2: Complete Sacred Icon.
- Sacrifice
Halo CE: Activate Terminal 2 on Halo.
- Obsessed
Halo 2: Activate Terminal 13 on The Great Journey.
- Sample Plate
Complete three cross-game playlists.
- Official Business
Halo 2: Beat the par score on Gravemind.
- Oh, These Baubles?
Collect 6,000 campaign or playlist medals.
- Sandbox Skull
Halo 3: Find the hidden Skull on the Sandbox multiplayer map.
- Scarab Lord
Halo 2: Acquire the Scarab Gun.
- Oracle
Halo 2: Complete The Oracle.
- Scavenger Hunt
Kill 1000 Jackals.
- Orbital Skull
Halo 3: Find the hidden Skull on the Orbital multiplayer map.
- Scholar
Halo 2: Activate Terminal 11 on Uprising.
- Scorched Earth
Halo 2: Beat the par score on High Charity.
- Orpheus
Halo 3: Beat the par score on Cortana.
- Scurty Bump
Halo CE: Beat the par time on Keyes.
- Ouroboros
Halo 4: Beat the par time on Infinity.
- Seconds
Halo 2: Complete a Halo 2 playlist.
- Outskirts
Halo 2: Complete Outskirts.
- Overachiever
Halo CE: Beat the par score on all Halo: CE levels.
- Shadow of Sundered Star
Halo 4: Beat the par score on Forerunner.
- Overshields are for Sissies
Halo CE: Complete the level The Pillar of Autumn on Legendary without picking up an overshield.
- Pacifist
Halo CE: Finish The Silent Cartographer without shooting, grenades, melee, dying or restarting.
- Party Pooper
Earn a total of 250 Killjoy medals in matchmade games.
- Pest Control
Kill 100 Crawlers.
- Sharpshooter
Win 150 multiplayer games.
- Shields Up!
Halo 2A MP: On Zenith, personally activate the center energy shield 3 times in one matchmade game.
- Shook the Hornet's Nest
Halo 2A MP: Get 30 kills with the Hornet in multiplayer.
- Shut. Down. Everything.
Halo 4: Beat the par time on Shutdown.
- Shutdown
Halo 4: Complete Shutdown.
- Scarab Slide
Halo 3: Beat the par time on The Covenant.
- Sounds Familiar
Halo 3: This stuff is your history!
- Speed Demon
Halo 3: Beat the par time on all Halo 3 levels.