amnesia the dark descent made me crap myself, just saying :whistling:
Was a great experience and a great game, not for combat though.
Definately this, if you have enough pants left and don't need to fight in every game.
But its very stressful. I've never experienced a game like this, but it really triggered my survival instincts

.
Maybe you like Doom 3. Unfortunately, the scary moments are because enemies appear somewhere out of nothing <- I personally hate that, but the atmosphere is good.
Fear is more creepy, much more my taste.