Best Survival Horror/First Person Shooters

[Steamforger]

Steam says I've played Left 4 Dead 2 196 hours in total. I call that replayability.
I enjoyed Bulletstorm very much.

[Yogimus]

the original system shock is free to play now. It is the grandfather of bioshock.

http://www.systemshock.org/index.php?topic=211.0

Greatest plot in any sci fi game.

[Wrenchbender1]

If you want an amazing FPS that no one really played then you should play The Chronicles of Riddick: Escape From Butcher Bay.

I'll second that. It was a lot better then I had anticipated. Metro 2033 was a good one as well. It was like a much more intense (and more linear) version of S.T.A.L.K.E.R.

[bubblewhip]

Update:

Go buy System Shock 2 now on gog.com

I demand it if you love Horror/First Person shooters. This is the best horror survival shooter ever made period. I played it for the first time in 2009 and still found it to be absolutely unsettling and challenging.

This game used to never be released online and Ebay copies would go up to about $100 a disc for a legit copy of System Shock 2, and compatibility patches to make it all work with windows was hell. Gog.com finally put it up after 13 years since it's release and it's perfectly emulated to work on modern machines.

[Odahi]

I second F.E.A.R. (pc). I just got my copy back, I had lent it to a friend at work. His quote, "I couldn't finish it. I can only play after the kids go to bed, and it was creeping me out!"
I'm currently playing Far Cry 3, and in my second go-through. I like this game as much as the second one, and I still have THAT loaded and ready to go if I ever get bored. I've beaten FC2 at least 15 times, I still love that game. FC3 looks to be just as good. It may not be horror per se, but it's lots of fun.