Halo CE Anniversary Achievements not unlocking

The achievements were Silent Cartographer, Assault on Control Room, and "What have we here?" all for Halo CE: Anniversary Edition.

Sorry I forgot to mention those.

Hey there

What are the achivements called?

What game?

This will hopefully allow me to see your games and see how and what you need to do in order to unlock them

Regards

I cleared the system cache and it has been fixed.

I had a similar problem with Halo ODST where achievements that were previously unlocked then re-appeared as locked both in game & on Halo Waypoint. However, I started a new game on a new Xbox and all the achievements reappeared again after I finished the
first level. Not sure why it happened but it might be worth trying.

[quote user="noboundz"]

You got "That's a Knife," which is indeed a Halo: Reach achievement, not a Halo: CE Anniv. one. Perhaps you can obtain Reach achievements through CE's firefight mode?

[/quote]

Yes you can as you are playing Halo: Reach when playing on the Anniversary Map Pack.

Any Achievements earned while playing the Halo: Combat Evolved Anniversary Campaign are for
Halo: Combat Evolved Anniversary. Any Achievements earned while playing on the Anniversary Map Pack are
Halo: Reach Achievements, and since it's Halo: Reach Multiplayer any standard (non-map specific)
Halo: Reach Multiplayer Achievements can also be earned.