Condemned: I never finished this because it was too scary for me. Granted, most of the scares come from "pop out"-like moments, but still...there's nothing scarier than a deranged hobo running at you with a pipe.
Fatal Frame 2: I find that Japanese ghost stories are the scariest
Silent Hill 1: Had to sleep with the lights on for a couple days
Dead Space: What makes this game scary is the atmosphere and how well the Necromorphs are animated. Also, the disembodied voice singing "Twinkle Twinkle Little Star" was unnerving.
Fatal Frame 2: I find that Japanese ghost stories are the scariest
Silent Hill 1: Had to sleep with the lights on for a couple days
Dead Space: What makes this game scary is the atmosphere and how well the Necromorphs are animated. Also, the disembodied voice singing "Twinkle Twinkle Little Star" was unnerving.