Horror/Survival Shooter.

I just passed Dead space 2 and my hands are itching for more horror shooters.. :(

I have played these games:
Dead space 1 & 2
Silent Hill
Alone in the dark (the latest)
Resident evil 5
Alan Wake

And a bunch of older games (all silent hills + resident evils etc.)

I also have Amnesia the dark descent.

Any other recommendations?

Killing Floor.

Penumbra, probably the best answer you're going to get 8).

SS, SS2, Call of Ctulhu, Condemned: Criminal Origins, etc.

Killing Floor.

ultimateGunner2

This

FEAR, Cryostasis, Stalker, Metro 2033.

Penumbra - Amnesia came from the same developers, but doesn't really touch the Penumbra series in terms of horror. The first game isn't the scariest, but it is unsettling, but once you reach the second, it is truly terrorfying.

S.T.A.L.K.E.R. - While it isn't exactly a horror game, it is extremely immersive. Many parts of it will get you very jumpy and leave you on edge. Also a three game trilogy.

METRO 2033 - Another game from the creators of S.T.A.L.K.E.R.. Very immersive, with an amazing story. One of the best single player FPS titles out there, and a worthy horror mention as well.

Clive Barkers Undying - If you can get around the dated graphics, you're in for a real treat with this one. The scares come more from the story and the atmosphere than the creatures in the game themselves.

Cryostasis - I don't know much about this one, as I've only had the chance to play the beginning so far. But even from that, I can tell that it is going to be a horror game that will be on reccommendation list for years to come.

Call of Cthulhu, Cryostasis (Although it runs poorly, very poorly), F.E.A.R. and it's expansions (which are far more scary than F.E.A.R.) and F.E.A.R. 2, Metro 2033 (Not scary but it's definetely a horror game) and Condemned are your best choices.

METRO 2033 - Another game from the creators of S.T.A.L.K.E.R.Deathykins

Not exactly. The game was made by another studio that was founded by designers who left the original Shadow of Chernobyl team.

Metro 2033 is a good pick-up. Very atmospheric game.

Zombie Panic Source.

Though surviving is generally the last thing you'll end up doing.

condemned criminal origins. Very tense and scary game

Call of Cthulhu, it's pretty cheap on Steam and it's incredibly creepy, the same can be said about Undying but you'll have to order it from eBay or Amazon.

The only ones that I can think about and have played are:

STALKER, FEAR, Doom 3, Metro 2033, Undying, Left 4 Dead.

Comdemned: Criminal Origins isn't a shooter but it is also action based and Call of Ctulhu: Dark Corners of the Earth starts being more action adventure and ends up being more of an action shooter in the last levels. The same with Cryostasis, more of an action adventure.