The Penumbra Series (2007 - PC, MAC, Linux), a real horror game:
http://www.penumbragame.com/

Probably Amnesia: the dark descent (TBA 2010 - PC, MAC, Linux), I preordered it:
http://www.amnesiagame.com

Half Life 2 might not be a survival or horror(with a few exceptions in some parts of the game) but it's pretty atmospheric.I'd say the same about Bioshock.You should give them a try.


No need to recommend RE or SH.Those two are musts.

if you're retro, try the clock tower series

Try the Fatal Frame Series... and Haunting Ground (I think it's called "Demento" in some countries).
I can't recommend anything else because you already have all the other ones I could recommend on your list.

Here is a few good choices

Rule of Rose (a brilliant underrated gem)
Fatal Frame 1-4
Clock Tower 1-3
Siren Blood Curse
Condemned
FEAR 1
Eternal Darkness
Parasite Eve 1-2 (jrpg/ horror, if i did't like one try the second one. Its gameplay is like RE)
Resident Evil games (minus 4 & 5 of course)

Not really a horro, but Bioshock can be a bit scary.

Alan Wake is a must though.

Eternal Darkness is my choice

I would start with Resident Evil 0 and then move to Resident Evil 1. Also I am sure others have mentioned it but Alan Wake is good too.

System Shock 2 - Best horror game ever made as far as I'm concerned.

The Suffering