The Dunwich Building from Fallout 3 creeped me out to no end. That was one are where I really hated going through, but thank the God that I don't believe in that I had that Ghoul Mask. Oh and there are a bunch of diaries in Dead Space that creeped me out, one that comes to mind is when the guy dismembers himself while the tape is still going and just about all of them when Ben Temple and his crew are trying to get the ship working.