Originally Posted by gibbeynator
Has anyone experienced a bug that causes chapter completion achievements to re-lock? It's something that's been bugging me since I first played it.
Yes. But when I started a new game and replayed the levels they unlocked again and stayed unlocked. Luckily I stopped playing after the 3rd level so I didn't have too much replaying to do. But it pissed me off so much that it took me two years to come back to this game. I finally finished all but the two bugged achievements.