Already discouraged with this game. Cheevos not unlocking. ,only noticeable difference is 60fps. Cinematic and in game cut scenes look kinda blurry. No massive improvement. No open multiplayer. I hope halo wars 2 is better.
Halo Historian wouldn’t unlock for me. It’s stuck on 97% but I’ve got all timeline events unlocked!?
Nevermind, just unlocked a min ago 
Nevermind, just unlocked a min ago
I had this problem yesterday, at least it wasn’t all in my head.
I’m stuck at 97% as well, not unlocking 
I have quite a few that haven’t unlocked. Mostly they are the in-campaign achievements that don’t. It is very frustrating, this was one of my favorite games on the 360, and I have really enjoyed playing again.