The original three Stalker games made a surprise appearance at today's third-party Xbox showcase – surprising to those who hadn't seen the leaks, anyway – with a "refined" trilogy bringing the games to consoles for the first time.
Stalker: Legends of the Zone Trilogy comes with Shadow of Chernobyl, Clear Sky, and Call of Pripyat. The whole trilogy is available today for $39.99, or you can get the individual games for $19.99 each. The trilogy was revealed at the Xbox show but is also available on PlayStation. (As it happens, the games are cheap on Steam right now, too.)