I’ve been playing MCC since launch, and I’ve noticed that some acheivements show up as “Done! Unlocking…” in the progress bar, although They haven’t unlocked and its been 24 hours. Anyone else having this problem?
Yup. Same here. I completed the entire CE campaign and I have the individual achievement for completing every mission except for “The Pillar of Autumn” and “Halo”.
I played first level of campaign with 15 achievements not unlocking after it say unlocked
bad glitch needs to attention
Happening to me as well in Halo 2, Halo 3, and Halo 4. surprisingly not in CE yet
Yep same here… Played whole level coop in halo 2 (outskirts) and got no achievement for completing it. But when you go into the campaign tabs for halo 2 and look at outskirts mission it shows it being completed.
I suppose they’ll unlock eventually, right… RIGHT!!
I have only one left that hasn’t unlocked and that’s for the the pillar of autumn completion. I did that the day the game came out and still no unlock. Hopefully it will soon.
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> Yup. Same here. I completed the entire CE campaign and I have the individual achievement for completing every mission except for “The Pillar of Autumn” and “Halo”.
Those same achievements aren’t unlocking for me either. I ran through “Pillar of Autumn” so many times to try and get it. My achievement lists shows I’ve completed it, but it won’t actually give me them.
Same for me here. Finished the Halo 4 level ‘Requiem’ on launch day and the Achievement still says ‘Done! unlocking…’. I’m starting to think that it will never pop. 
My problem is also with the Pillar of Autumn mission. Perhaps this is an issue with that specific achievement?
I was actually able to earn the Achievement for completing The Pillar of Autumn without any problems. So far, I have not had any issues unlocking Halo: CE Achievements
All of their attention seems directed at the multiplayer issues. Every time I post something to support they send me a message with a link to the bug report investigation and never see anything about achievements.
I have beaten all 4 campaigns on legendary yet the achievements and avatar for completing, Outskirts, Metropolis, Infinity and Halo won’t unlock after multiple completions. I really hope 343i is working to resolve this.
I beat Halo 2 on Legendary with a time of 2:56:57… yet no achievment. Its not even saying Done… Unlocking
The only achievement I am having issues with is Halo on CE. It has said Done…Unlocking since the launch of this game. It makes me sad.