Not receiving my achievements

Games Halo: The Master Chief Collection
1

I have done my campaign for halo one mcc but i am not receiving my achievements. May i receive some help?
Gamertag: Phantom Itachi

2

Its just a bug, you’ll have to do it again most likely once some patches fix it. I’m not getting achievements either, I’ve had multiple at “Done! Unlocking” since launch day.

3

im haveing the same problem in halo 2 CE, is this for the whole game do you know?

4

I’m quite interested in this as well since, I haven’t received my achievements for completing some campaign levels as well as finding the terminals. For example, Pillar of Autumn indicates (100%) but it is not unlocking.

5

I played with a friend who was getting Achievements by himself. Later made him party leader and played some Co-Op next thing you know mine started to unlock. Try that and see if it works.