no silent hill 2? the fuck! also fatal frame 3 is WAY scarier than fatal frame 2. rope maiden = :'(
if i had to pick games that freaked me the fuck out, i would go with
1) silent hill 2. moody, disturbing, and legitimately unnerving, with a deliberately misogynistic theme that plays into the game's overall plot and narrative.
2) system shock 2. MONKEYS AND NURSES ARE FUCKING SCARY WHEN THEY ARE MUTILATED HALF-ROBOT CORPSES. those monkey screams will haunt me forever.
3) the first and last thirds of clive barker's undying. this is the game eternal darkness wishes it was, with the middle third (eternal autumn, snooze) being the game eternal darkness is: boring and repetitive.
4) fatal frame 3. the rope maiden shit is fucked up, and the male lead's fate = :'(
5) silent hill 4. atrocious gameplay, but it has scares up the wazoo. being chased by indestructable and freaky-ass ghosts of tortured victims is YIKES,and the plot is suitably lynchian.
special mention: silent hill 1 and 3. probably the best PLAYING games in the series, but the bog-standard evil cult plot is a mega-bore. still, worth it for the freaky visuals and astonishingly awesome art direction.