Fix Halo Infinite Achievements Not Unlocking. Despite their best efforts, many players have still been unable to unlock the act of genesis in halo infinite. I found a fix for me, go into a campaign, and pause the game with esc, then click the achievements button, it forces a sync with the server.
A couple of the equipment unlock achievements have not been unlocked either. Why you shouldn't use quick resume. The alchemist of the mysterious dream.