Halo 5: Guardians achievements

Halo 5: Guardians

4.3 from 5823 votes

There are a maximum of 73 Halo 5: Guardians achievements (65 without DLC) worth 2,965 (1,250)

139,618 tracked gamers have this game, 4,634 have completed it (3.32%)

Achievement Details

All for One in Halo 5: Guardians

All for One102 (40)

This is a rare achievementComplete every co-op Mission on Heroic difficulty.

  • Unlocked by 21,416 tracked gamers (15% - TA Ratio = 2.54) 139,618  

Achievement Guide for All for One

283,042 (145,455)
Achievement won on 29 Oct 15
TA Score for this game: 2,965
Posted on 27 October 15 at 12:25, Edited on 30 July 16 at 10:40
This solution has 40 positive votes and 9 negative votes. Please log in to vote.
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 http://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 http://www.trueachievements.com/Halo-Spartan-Assault/ac....htm 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.

http://www.trueachievements.com/a208881/legacy-achievem....htm http://www.trueachievements.com/a208882/heroes-rise-ach....htm http://www.trueachievements.com/a208912/one-for-all-ach....htm http://www.trueachievements.com/a208913/all-for-one-ach....htm
There are a few achievements which you can only get on Legendary difficulty: http://www.trueachievements.com/a208905/tank-still-beat....htm http://www.trueachievements.com/a208907/harbinger-achie....htm http://www.trueachievements.com/a208883/forging-a-legen....htm http://www.trueachievements.com/a208911/lone-wolf-achie....htm
Then there are the collectables: http://www.trueachievements.com/a208884/conspiracy-theo....htm http://www.trueachievements.com/a208886/hunt-the-truth-....htm
http://www.trueachievements.com/a208876/gravedigger-ach....htm http://www.trueachievements.com/a208888/gravelord-achie....htm
There are 63 comments relating to this Solution | Please log in to comment on this solution.
There is 1 other Solution for this achievement
Do you have a question about this achievement? Please post it in the Halo 5: Guardians Forum