No Halo Reach Legendary Achievement

After defending Dr. Halsey’s lab, during the cutscene anti cheat messages started popping up and after the cutscene ended, I didn’t get an achievement for The Package and the game kept sending me to the campaign menu when trying to load the last mission. I exited Halo then started it without the anti cheat bull and finished the rest of the game, but didn’t get an achievement for the last mission nor did I get an achievement for beating the game on Legendary. It seems the problem has been occurring to people since December, so what gives?

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> After defending Dr. Halsey’s lab, during the cutscene anti cheat messages started popping up and after the cutscene ended, I didn’t get an achievement for The Package and the game kept sending me to the campaign menu when trying to load the last mission. I exited Halo then started it without the anti cheat bull and finished the rest of the game, but didn’t get an achievement for the last mission nor did I get an achievement for beating the game on Legendary. It seems the problem has been occurring to people since December, so what gives?

Is this for Reach on the MCC or Xbox 360?

Playing with anti-cheat off disables achievements. I guess that you will have to redo the missions where the game didn’t register them in the normal startup.

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> Playing with anti-cheat off disables achievements. I guess that you will have to redo the missions where the game didn’t register them in the normal startup.

It’s nothing to do with that, lol. This is an actual legit issue, even with anti cheat on. People are beating campaign missions and not getting credit.

I had to beat Sword Base twice today on Legendary for it to count, and I played Nightfall twice and DIDN’T get credit either time. **And we’re NOT just talking achievements here.****The campaign mission literally still says ‘Unplayed’ on those levels, or does on Nightfall and DID on Sword Base.**Incidentally it’s only happened to me for Reach.