For me it would be DEAD SPACE ex.(This happen in real exact words) Im walking around minding my own buisness then a ******** alien gets up from playing dead xD and he like coming bish i want to rape you i started running my a** off then turn back start shooting and im like go sleep go sleep xD and dead space is a beast game except when things like that happen xD
metro 2033 it is like oh crap here comes a howler don't brake my gas mask or i brack your face *click* crap no ammo run away there is not alot of ammo you need a gasmask most of the time and power is the same way traveling in a metro after a nuke went off is scary as hell most of the time if your not fighting monsters your fighting humans
Well I found Kirby's epic yarn pretty scary... jk
I Don't really play horror games but I have seen a couple. Clock tower was kinda scary if anyone has ever played that