MCC REACH CAMPAIGN ACHIEVEMENTS NOT UNLOCKING

I've recently completed Halo Reach MCC on Legendary difficulty solo. However the missions."The Package" and "Exodus" still remain incomplete. I decided to play the package again on legendary difficulty, completed it, got to the end of the cutscene, still no achievement.

Really hope this gets fixed soon, honestly quite annoyed that I replayed the mission only to get nothing out of it.
Whole mission was played in one shot without stopping and barely any deaths. Also if I did not complete the mission, how would it be even possible for me to progress to the next few missions and complete them solo?

I'm having this issue with the par time on Tip of the spear. I did get the achievements for completing all missions under par but mission 5 isn't unlocking for me.

Lucky for you guys. I have played Long Night of Solacd twice now and it hasn't tracked. I hate this mission the most of any games, and it has been such a slog. Also imagine my annoyance when I try to get the legendary ending where I can see chief only for it to end and I realize this once crappy mission didn't register.

Same. I've had this happen on three different missions. I'm going through for the solo legendary completion achievement. Just spent an hour on The Pillar of Autumn for it to not count. Love it.

Same thing on the Package. It doesn't register the completion. I got the achievement for not damaging the tank but no achievement for ending the mission.

Any fix?

I had to complete Sword Base 3 times before it showed as complete. Currently the Package and PoA are not showing as complete on Legendary Solo. Am going to wait until an official fix or word there of is made. Definitely frustrating.

Finished The Package for the 3rd time after reinstalling and it worked.

Right after I tried PoA for a second time and it didn't unluck. Sucks... Hope they fix it

What’s odd is the game recognizes I’ve beaten Winter Contingency on Legendary, but it won’t give me the achievements for completing that or on hard. I guess it’s just a matter of running the missions over till i get it?

MCC: Reach - PC

I just completed the the "Classic Completion" 3 times, once yesterday night and twice today, as well as "This is Not the Greatest Lab in the World..." once today. Both achievements fails to unlock on Steam and in the Career and Options -> Reach Achievements shows they are still locked within the game. =(

I dunno what else to do. I tried restarting my comp and that doesn't fix it. I had an issue yesterday (like around 11:30pm PST) where I would complete an achievement (Did You Major in Marine Bio...), quit and re-enter the game. Then upon re-entering the game granted that achievement. But after that, all achievements stopped working for me.

I am on the Pillar Of Autumn but the achievement hasn't made any progress like I haven't done it. I am doing it with 2 skulls, Grunt Brithday Party and IWHBYD and if that is why it hasn't progressed then that makes no sense because it makes no in game advantage and there hasn't been 1 special dialogue so I don't understand why it hasn't worked.