I recently just redownloaded HALO: MCC, and some of the Halo 2 campaign mission achievements popped up from beating it back when it first released. But the rest of the campaign missions like, Regret, Sacred Icon, Quarantine Zone, Gravemind, Uprising & High Charity, Legendary Mission Completetions aren’t popping up and it still says they’re locked!? I tried playing them again and me and my friend beat a few missions and still, they don’t unlock the achievements for me? My friend gets them, smh. Like, it’s 2018!