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Bro Hammer

Complete any co-op level on Legendary difficulty.

Bro Hammer0
3 guidesOnline/OfflineCooperativeMain StorylineDifficulty SpecificStackable
the JeffreyTMthe JeffreyTM558,651
11 Nov 2014 09 Dec 2021
80 1 11
EDIT: December 9, 2021: It has come to my attention that MCC no longer allows players to select prologue/epilogue missions from the mission select screen while in co-op, therefore I am updating the guide to have valid information.

However, I have found out that you can still access the prologue missions and get the achievements in co-op by using the full campaign playlist.

So, the fastest way to get this achievement now is to put in a second controller or invite a friend to your lobby, go to Campaigns, select Halo 3, then Playlists, and scroll down to select the “Legendary Campaign” playlist. After starting the playlist, either watch or skip the opening cutscene and after it is over, the next mission will load and you will unlock the achievement.

This will also unlock two other co-op specific achievements, "Standard Operating Brocedure" and "Brovershield," if you haven’t unlocked them already.


Original Solution:
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Borg561Worked for me just now. I know they were having issues the last few days (I still have a few achievements that show 100% complete but haven't unlocked). If your progress bar shows as complete, give it some time. If not, I'd say try it again.
Posted by Borg561 on 13 Nov 14 at 01:50
the JeffreyTMYes It is glitched for me too.. I go to the achievement list and it says "Done! Unlocking..."
Posted by the JeffreyTM on 13 Nov 14 at 21:30
SteelCurtainD24it has to be done with a friend there is no matchmaking
Posted by SteelCurtainD24 on 14 Nov 14 at 16:53
bryan dot exeWell I just beat Halo 4: Requiem on solo Legendary and all of these co-op achievements popped at the end. I go back to the mission select screen and it correctly shows that I've completed that mission on solo Legendary and have not completed them in co-op. Weird. No idea if this can be replicated for others.
Posted by bryan dot exe on 17 Nov 14 at 18:02
S P 4 C E YI've done this a whole bunch of times, both in local and online coop. It clearly has issues.

I'll wait for it to magically unlock at a later date. Seriously MS??!
Posted by S P 4 C E Y on 18 Nov 14 at 09:05
EFFEKT 45I got this and the other 2 by playing only single player, and haven't at any point played with anyone else, it unlocked on Halo 4: Forerunner, kind of like DJ Drty Chapstk.
Posted by EFFEKT 45 on 19 Nov 14 at 19:35
Bergan SWEExactly the same happened to me as for effekt 45 above. Never played coop. Really, really glitchy achievements on this game. Didn't get anything for completing Requiem on Legendary for example.
Posted by Bergan SWE on 21 Nov 14 at 09:31