You'll know them best as the developers of S.T.A.L.K.E.R. (does that even stand for anything?). They've gone under. Sucks. I wasn't much of a fan of Stalker, but there's no denying they had a unique approach to game design, and they'll be missed.
http://www.rockpapershotgun.com/2011/12 ... er-2-dead/