No Achievements Unlocking

I’ve beaten the campaign coop and single player. And nearly 20+ hours of multiplayer later NOT a SINGLE Achievement has unlocked for me…this is breaking my heart. Please help!!!

Same for me,I have no clue why this is happening

i just beat it on legendary solo and the complete mission 14 and 15 achievements did not unlock as well as any of the campaign completion achievements.

Haven’t beaten campaign yet, but definitely did a bunch of things that the achievement list says unlocks achievements and haven’t unlocked anything? No missions, no changing Spartan ID, nothing? I really don’t want to have to shelve this game like I did MCC, what’s up?

Playing solo campaign now myself and nothing is unlocking for me either. :confused: