GSC Game World, computer games developer, its publishing subdivision GSC World Publishing and Deep Silver, the games label of Koch Media, a leading producer and distributor of digital entertainment products, today announce that S.T.A.L.K.E.R.: Clear Sky has shipped worldwide.

The Game had been delayed in the United States following a manufacturing error which pushed the release date back in the US till September 15th.

The follow-up to the original game, S.T.A.L.K.E.R.: Clear Sky is a survival FPS game for PC based on a 'what-if' scenario of the second Chernobyl Nuclear Power Plant accident. The game is created as a warning to mankind against mindless play with technologies.

S.T.A.L.K.E.R.: Clear Sky is the official prequel to the renowned S.T.A.L.K.E.R. game by the Ukraine-based GSC Game World studio. The game is set in 2011 and brings forth the events to have preceded the third campaign of Strelok to the Zone center. S.T.A.L.K.E.R.: Clear Sky introduces an alternative look onto the events of the original game and offers the player to try himself out as a mercenary s.t.a.l.k.e.r. in search of his own path in the world of S.T.A.L.K.E.R.