Amnesia: The Dark Descent is pretty creepy. I didn't actually get a hands-on experience, but merely watching it creeped the holy hell out of me. Not a game I think to really play because I'm a bit of a wimp...but man enough to admit it. Yup.

And I agree with the person who created this thread, Dead Space did indeed become stale in the enemy category. Not enough diversity, but still excellent survival horror.