Looks really good..ya can buy it from Steam for $20 (maybe a bit less for you US guys)
Shattered Horizon
http://www.shatteredhorizon.com/
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And Ripley told me this is good!...he said he couldn't put it down
S.T.A.L.K.E.R. 3: Call of Pripyat
http://cop.stalker-game.com/?page=game