Completion achievement glitched?

[IIIII Aaron IIIII]

I have heard that the completion achievement is glitched? Apparently if you get the resistance hero achievement last the completion achievement will not pop however if you get the challange master achievement last it does? does any body know for certain? Any help would be appreciated, thanks

[Death Metal Jim]

This happened to me earlier today after unlocking Resistance Hero. I was sitting there, waiting for the Completion achievement to unlock, and it never did. So I exited the game, cleared my cache, turned off my Xbox, and loaded up the game again after re-downloading the patch, and the achievement still didn't unlock. What I did next was load up the last part of the game on the hardest difficulty, defeat the final boss, skip all the cutscenes, let the end credits play through, and when the after credits cutscene started to play that's when the achievement FINALLY unlocked. So you might want to give that a try, and also for anyone else who has or will have trouble unlocking this in the future.

[TriRock]

Our group of four unlocked Hero, but Completion glitched for all of us. One unlocked Completion the moment he entered the final fight, the rest of us unlocked it during it but without actually defeating the boss.