Watching an FPS whilst the Arma advert is surrounding the video...makes all other shooters look rather inadequate.
You might also want to have a look at SZone Online, which is basically STALKER Online, http://szone-online.net/ .
It's prob still in open beta, it was a little while back. I tried it and it was pretty rough looking, but it definitely had a STALKER style and feel to it.
I thought Survarium was the same as SZone but it looks like they are not.
@jflkdjs that ain't water
@jflkdjs what water? it was an odd goo not water