So I completed the full campaign on legendary on every game in Co-op with my friend. I never got some of the achievements for completing the missions when my friend did, and now he has the Legend achievement and I do not. Can I please get some help with this issue, I have spent much time trying to get the Helioskrill armor with my friend and even though it says I completed all Co-op missions on legendary it still denies me the achievements for some missions.
My xbox gamertag is lz SirSalty zl if any members of the support team want to check my progress on MCC.