Halo 3 "Devastating" Achievement Not Unlocking

I know there are posts every day of people having trouble getting various achievements to pop. For me this just so happens to be the Devastating achievement in Halo 3. The one that requires you to beat every level on legendary in under 3 hours. Me and my friends did this live on stream today, and both on waypoint as well as in game on the leaderboards our total time is marked as 2 hours 36 minutes and 10 seconds, but still no achievement on either steam nor Live. I tried beating the first level of the game on legendary again, I tried playing the epilogue. Anyone else got any ideas? I’m honestly pretty frustrated that we worked hard on this and now we don’t even get the reward.

Your times are recorded and well within 3 hours which is good. Any chance you used any 0x skulls?

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> Your times are recorded and well within 3 hours which is good. Any chance you used any 0x skulls?

I went back through the footage to double check and nope. Only skulls used were cowbell, IWHBYD and Grunt Birthday Party

Have you tried restarting your Xbox or doing a hard reset?

If those don’t work, you can try deleting your cloud save. Then, start the game up and let MCC sync your save file. That may force your achievement to unlock.

Also, go through your unlocked achievements and see if it unlocked without giving you a notification. That sometimes happens with MCC.

FOLLOW UP!
I logged into the game today and the achievement popped. I guess it was just super delayed. I’m just happy it worked. P.S. I’m on the Steam version but thanks for the suggestions anyway :slight_smile: