S.T.A.L.K.E.R.: Clear Sky – standalone prequel for the acclaimed S.T.A.L.K.E.R.: Shadow of Chernobyl, which tells you story about the Clear Sky group, that want to research the Zone and understand it better.
Like a lot of you (I'm guessing), I've never even tried the multiplayer modes in the terrific Stalker series, but it's good to know that I'll be able to if I ever get the itch. GSC Gameworld's post-apocalyptic horror shooter games are the latest to be rescued from GameSpy oblivion, via automagical Steam patches, or if you don't own the games on Steam, one equally magical manual multi-patch for all three games. This will switch the multiplayer servers over from GameSpy to GSC Gameworld's own, slightly less risky ones (it's not entirely clear who's running them, as GSC was dissolved in 2011).
If you've accrued an impressive set of statistics in Shadow of Chernobyl, Clear Sky or Call of Pripyat, those won't be saved, but if the post-apocalypse (and more destructively, the decline of GameSpy) has taught us anything, it's that nothing lasts forever, not even your kill-death ratio.
Previously on GameSpyWatch: Dawn of War, Battlefield 2/1942, Halo: Combat Evolved, Star Wars: Battlefront 2 and various Civs and Borderlandses' multiplayer modes have all been saved. Crysis and Crysis 2's multiplayer shenanigans have not.
Have a read of Ian Birnbaum's recent GameSpy article to see the full scale of the problem, and to meet the players fighting to keep the games alive.