Barnacles in Half-life 2 scare the hell out of me so i can't play it anymore.
Erm, headcrabs are quite freaky, esp if you don't have a ranged weapon.
Doom 3 is freaky as hell, i particularly hate Pinkys
Fallout 3 can be freaky, but its not too bad
Painkiller, in particular the town level. The background noise is terrifying and when I played it my sister was in the room and it scared the hell out of her. Its a shame the game hates Vista/7 and newer GPUs(Sadly boss fights have horrible shadow corruptions on anything newer than 2006 hardware)
Erm, Resistance 2 when I fell in the water in the beginning level and the alien thingymabobs come right up to you, really made me jump
F.E.A.R has some scary moments, like walking in a lift shaft and suddenly the lift out of nowhere comes crushing past you at high speed, made me jump. Or when you walk down a ladder and theres a guy standing at the bottom and he just dissappears
Oblivion when something creeps up behind me makes me jump, also the Ayleid ruins can be quite eerie, though not scary. The traps can sometimes make me jump if i'm not expecting them
The first time i encountered a flood in Halo, i remember there just being a few bodys and it was all quiet and then on the radar i just saw loads of red dots coming towards me and i thought "oh sh*t, this isn't good" and yeah, it was just a mad panic
Quake 1 made me jump on many occasions, the shambler and the trigen type monster scared me when I was younger
Bioshock can be quite freaky mostly in the noises you hear in the background
Is it also weird I find the red laser targeting beams in Crysis scary? just because you'll be walking through the jungle and suddenly loads of red lines will be going mad all over the place and you'll be like "wtf?!" then suddenly you'll get shot
I get scared quite easily
