Achievement Details

All for One

Complete every co-op Mission on Heroic difficulty.

All for One0
2 guides

How to unlock the All for One achievement

  • HolyHalfDeadHolyHalfDead529,635
    29 Oct 2015 27 Oct 2015 30 Jul 2016
    50 14 80
    The progress tracking for this achievement is buggy. I highly recommend you save the game near the end of each mission. After you complete the mission check that your achievement progress has increased. If it doesn't increase, reboot your Xbox One and check again. If it still hasn't increased at least you will know which mission to replay, hopefully just by starting from the save near the end. Credit to https://www.trueachievements.com/TheDB93.htm for finding this out the hard way.
    Completed every Mission in co-op on Heroic difficulty or above.

    The actual achievement description is misleading as there are no co-op missions in Halo 5, unlike Halo: Spartan Assault for example. What you have to do is complete the campaign missions with at least one other player. Halo 5 does not have a split-screen option either.

    For this achievement you will need an internet connection and an XBL Gold account enabled Xbox One. Whilst you can complete a co-op mission with only one player, you will not get the achievement. You need one, two or three other players.

    From the main menu select Campaign -> Co-op and press cn_A

    Select the first Mission and set the Difficulty to Heroic (or Legendary).

    Press cn_X to bring up the Roster, then press cn_RB to select the list of Friends.

    Select a friend and press cn_Y to send an invite, then press cn_B to go back.

    Once your friends have joined, start the mission, and when you complete all 15 missions you will all get the achievement. You do not have to complete all the missions with the same group, or in order.

    Here is a roadmap for possible achievements during a Heroic co-op campaign, listed in order. This will be a useful checklist for people setting up co-op sessions on TA. All 12 of the missions with combat have 2 related achievements, that may require co-op or a minimum difficulty.

    Halo 5: GuardiansYour Team is Your WeaponThe Your Team is Your Weapon achievement in Halo 5: Guardians worth 10 pointsCommand your team of Spartans in Osiris.
    Halo 5: GuardiansEnemy of my EnemyThe Enemy of my Enemy achievement in Halo 5: Guardians worth 39 pointsHelp the Elite General charge the hill in Osiris on Heroic difficulty.
    Halo 5: GuardiansInto the FireThe Into the Fire achievement in Halo 5: Guardians worth 11 pointsComplete Mission 1.
    Halo 5: GuardiansI Thought I'd Lost YouThe I Thought I'd Lost You achievement in Halo 5: Guardians worth 24 pointsEscape the Hunters in the lab and fight them in the hangar in Blue Team.
    Halo 5: GuardiansOn My MarkThe On My Mark achievement in Halo 5: Guardians worth 34 pointsSimultaneously assassinate two Elites in Blue Team co-op.
    Halo 5: GuardiansArgent MoonThe Argent Moon achievement in Halo 5: Guardians worth 11 pointsComplete Mission 2.
    Halo 5: GuardiansShoot from the HipThe Shoot from the Hip achievement in Halo 5: Guardians worth 28 pointsComplete Glassed without any players using Smart-Link.
    Halo 5: GuardiansGoing the DistanceThe Going the Distance achievement in Halo 5: Guardians worth 26 pointsComplete Glassed without entering a vehicle.
    Halo 5: GuardiansGlasslandsThe Glasslands achievement in Halo 5: Guardians worth 11 pointsComplete Mission 3.
    Halo 5: GuardiansRoots of the EarthThe Roots of the Earth achievement in Halo 5: Guardians worth 12 pointsComplete Mission 4.
    Halo 5: GuardiansWaiting on YouThe Waiting on You achievement in Halo 5: Guardians worth 12 pointsKill an enemy that's had its armor repaired in Unconfirmed.
    Halo 5: GuardiansMaverickThe Maverick achievement in Halo 5: Guardians worth 38 pointsTeam up in a vehicle to kill 30 enemies in Unconfirmed co-op.
    Halo 5: GuardiansStolen GauntletThe Stolen Gauntlet achievement in Halo 5: Guardians worth 12 pointsComplete Mission 5.
    Halo 5: GuardiansSaviorThe Savior achievement in Halo 5: Guardians worth 39 pointsKeep 6 miners alive at the elevator in Evacuation on Heroic difficulty.
    Halo 5: GuardiansFire DrillThe Fire Drill achievement in Halo 5: Guardians worth 34 pointsFinish Evacuation within 18:00 without dying on Heroic difficulty.
    Halo 5: GuardiansEscapeThe Escape achievement in Halo 5: Guardians worth 12 pointsComplete Mission 6.
    Halo 5: GuardiansNo WitnessesThe No Witnesses achievement in Halo 5: Guardians worth 37 pointsDestroy the Phantom at the Covenant camp in Reunion on Heroic difficulty.
    Halo 5: GuardiansTake a HikeThe Take a Hike achievement in Halo 5: Guardians worth 27 pointsTraverse the canyon without a Phaeton in Reunion on Heroic difficulty.
    Halo 5: GuardiansTogether AgainThe Together Again achievement in Halo 5: Guardians worth 12 pointsComplete Mission 7.
    Halo 5: GuardiansNo Knock RaidThe No Knock Raid achievement in Halo 5: Guardians worth 30 pointsDestroy 10 walls or floors in Swords of Sanghelios.
    Halo 5: GuardiansPreying MantisThe Preying Mantis achievement in Halo 5: Guardians worth 36 pointsComplete Swords of Sanghelios co-op with both Mantises on Heroic difficulty.
    Halo 5: GuardiansSwordsThe Swords achievement in Halo 5: Guardians worth 12 pointsComplete Mission 8.
    Halo 5: GuardiansOld BonesThe Old Bones achievement in Halo 5: Guardians worth 12 pointsComplete Mission 9.
    Halo 5: GuardiansKraken Lackin'The Kraken Lackin' achievement in Halo 5: Guardians worth 23 pointsComplete Enemy Lines without destroying a Kraken turret.
    Halo 5: GuardiansEmergency Boarding ProceduresThe Emergency Boarding Procedures achievement in Halo 5: Guardians worth 31 pointsEscape the doomed Kraken by jumping onto a Phaeton piloted by a Spartan.
    Halo 5: GuardiansBreakthroughThe Breakthrough achievement in Halo 5: Guardians worth 13 pointsComplete Mission 10.
    Halo 5: GuardiansStormboundThe Stormbound achievement in Halo 5: Guardians worth 13 pointsComplete Mission 11.
    Halo 5: GuardiansDeath from AboveThe Death from Above achievement in Halo 5: Guardians worth 32 pointsKill a Grunt and smash a grate with a Ground Pound in Battle of Sunaion.
    Halo 5: GuardiansWorms Don't SurfThe Worms Don't Surf achievement in Halo 5: Guardians worth 38 pointsKnock two Hunters into the ocean during the Battle of Sunaion.
    Halo 5: GuardiansCivil WarThe Civil War achievement in Halo 5: Guardians worth 13 pointsComplete Mission 12.
    Halo 5: GuardiansRolling ThunderThe Rolling Thunder achievement in Halo 5: Guardians worth 35 pointsOperate four different vehicles at once in Mission 13 on Heroic difficulty.
    Halo 5: GuardiansReclamationThe Reclamation achievement in Halo 5: Guardians worth 13 pointsComplete Mission 13.
    Halo 5: GuardiansPrison BreakThe Prison Break achievement in Halo 5: Guardians worth 44 pointsSimultaneously kill two Wardens in The Breaking on Heroic difficulty.
    Halo 5: GuardiansA New DawnThe A New Dawn achievement in Halo 5: Guardians worth 13 pointsComplete Mission 14.
    Halo 5: GuardiansIcy CoolThe Icy Cool achievement in Halo 5: Guardians worth 31 pointsUse a Ground Pound on an exterior power core in Guardians on Heroic difficulty.
    Halo 5: GuardiansDouble StuffThe Double Stuff achievement in Halo 5: Guardians worth 37 pointsSimultaneously destroy 2 cores in Guardians on Heroic difficulty.
    Halo 5: GuardiansSentinelsThe Sentinels achievement in Halo 5: Guardians worth 13 pointsComplete Mission 15.
    Halo 5: GuardiansLegacyThe Legacy achievement in Halo 5: Guardians worth 13 pointsComplete every Mission of the game on Normal difficulty.
    Halo 5: GuardiansHeroes RiseThe Heroes Rise achievement in Halo 5: Guardians worth 74 pointsComplete every Mission of the game on Heroic difficulty.
    Halo 5: GuardiansOne for AllThe One for All achievement in Halo 5: Guardians worth 17 pointsComplete any co-op Mission on Heroic difficulty.
    Halo 5: GuardiansAll for OneThe All for One achievement in Halo 5: Guardians worth 106 pointsComplete every co-op Mission on Heroic difficulty.

    There are a few achievements which you can only get on Legendary difficulty:
    Halo 5: GuardiansTank Still Beats EverythingThe Tank Still Beats Everything achievement in Halo 5: Guardians worth 27 pointsFinish the 13th mission without losing the Scorpion on Legendary difficulty.
    Halo 5: GuardiansHarbingerThe Harbinger achievement in Halo 5: Guardians worth 43 pointsComplete The Breaking on Legendary difficulty without the entire fireteam dying.
    Halo 5: GuardiansForging a LegendThe Forging a Legend achievement in Halo 5: Guardians worth 143 pointsComplete every Mission of the game on Legendary difficulty.
    Halo 5: GuardiansLone WolfThe Lone Wolf achievement in Halo 5: Guardians worth 281 pointsComplete every Mission of the game by yourself on Legendary difficulty.

    Then there are the collectables:
    Halo 5: GuardiansConspiracy TheoryThe Conspiracy Theory achievement in Halo 5: Guardians worth 11 pointsFind and claim one piece of Intel.
    Halo 5: GuardiansHunt the TruthThe Hunt the Truth achievement in Halo 5: Guardians worth 123 pointsFind and claim all Intel.

    Halo 5: GuardiansGravediggerThe Gravedigger achievement in Halo 5: Guardians worth 16 pointsFind and claim a Skull.
    Halo 5: GuardiansGravelordThe Gravelord achievement in Halo 5: Guardians worth 121 pointsFind and claim all Skulls.

    Guide not helping? View 1 more guide for this achievement.

    Showing most recent comments. View all comments.
    monkeybiscitzHit me up to run through the coop achievements GT: monkeybiscitz
    Posted by monkeybiscitz on 06 Apr at 03:05
    QueezyCrunchNeed to do this and a few other coop achievements- msg QueezyCrunch if interested
    Posted by QueezyCrunch on 04 May at 13:50
    ghostdeep88Looking for any players to do co-op campaign
    GT ghostdeep88
    Posted by ghostdeep88 on 18 May at 13:41
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  • togethawiistandtogethawiistand381,390
    06 Dec 2015 02 Dec 2015 02 Dec 2015
    5 0 1
    I wrote the below solution for the Legendary difficulty run, but you can apply some of the same ideas if playing on Heroic.

    SOLUTION:
    1. Use and abuse the nearly unlimited ability of sprinting so you can avoid a lot of fights.

    2. If you keep dying while trying to do step 1, then you might want to consider the opposite approach and take the time to clean all the enemies that can do considerable damage against you before you can go through a door/passage/objective. You don't have to clean every single little grunt everytime unless it's necessary for the story to proceed. I skipped, for instance, most of the Battle of Sunaion level just running through. Other times, like the descent down the Guardian's body in the level called Genesis, I'd die everytime I tried to jump jump jump run run run. So I knew it was time to try a different approach, taking the enemies out with the Battle Rifle from a distance or even while in the air, and it worked.

    3. Frequently push up on your D-Pad (cn_up) towards an enemy to highlight him and command your team to help you wipe him out, 1 enemy at the time, specially the most dangerous ones and the closest to you, otherwise, if you send them to kill the sniper that's behind the whole enemy army, they'll likely end up dying. You'll notice that they'll help a lot more if you constantly command them against an especific target. You can also command them to change the weapons they're using by looking closely to the weapon you want them to pick up and highlight it. One of the 3 members of your squad will take it. If the wrong person does it, have them undo it and highlight it again. I couldn't decide if it was worthy giving them power weapons (such as the prometean rocket launcher) or if it was best to keep the spares for myself. If you're just passing through but can't carry any more, then I'd say it's best to give them up to the other members. Anyways, just make sure they have good weapons. Covenant ones (in general) seem to be the weakest of all 3 factions.

    4. Sometimes is better to let your team die if you can't control them or pay too much attention because you're trying to survive. They will spawn back, although it takes a little while.

    5. Related with the step above, when fighting the Boss, stay out of his physical reach as much as possible. For instance, in one of the open space fights, I jumped down to the ground where the "W guy" (trying to stay spoiler free) was only after I ran out of all the ammo I could find in the high ground caves I came from. So I took A LOT of his minions from afar. When fighting him in an indoors/closed area I kept him tagged so I could easily watch and avoid him, always keeping some kind of obstacle between us to cancel his direct hits and special attacks. In one of these areas I noticed later that there were special weapons (a prometean rocket launcher, for instance) on those high platforms that stay at mid-air, so that helps too, provided that you perform the jump to reach them.

    6. Still about the recurring boss, I'm glad I could skip our 4th encounter on The Breaking as showed on this youtube video (not my video): www.youtube.com/watch?v=tP49F59FUDw
    It's not that hard to perform the jump, it took me at best 10-15 tries and remapping the controller buttoms to make it easier for me to press them correctly. I think the video doesn't mention it, but if you're falling too short on the corner that you're trying to reach, you might want to try and run straight first on the small pillar you're standing on, just enough for you to jump to the side then, thrust and ground pound in the corner. If you don't fall exactly on the top be ready to try and grab the edge and climb up (cn_A)
    So, I never had to go through that fight, but I guess this is a HUGE help, frustration and time saver.

    7. My final advice is for when you keep getting killed by the same enemies before reaching a checkpoint. It happened to me on the last mission with the blue team and it was a pain. The enemy snipers were getting me constantly, it seemed like a impassable frustration. In reality I was just tired and didn't want to repeat all the same other kills only to get another shot at the guys that were killing me over and again. But I had to, so I took my time, waited for the rest of blue team to respawn back a few times (always wait for all of them instead of sending just one alone to fight for you), as many times as it was needed and then started to mark the snipers real quick and went back to cover, ready my "Smart-Link" (what a fancy name) and then took them out 1 by 1, before rushing back to cover. Always stayed away from Knights, because they are also deadly and can overcome you as well as the party with ease.

    Well, these were the tatics I learned while playing. If I remember anything more useful I'll update this solution as well. Feel free to leave a comment too and a thumbs, if any of it ends up helping you. Thanks!
    Showing only comment.
    The 3rd Discipladd or msg me if any1 would like to co op Halo 5
    Posted by The 3rd Discipl on 03 Dec 15 at 19:06
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