GSC Game World is a Kiev-based computer game developer. Founded in 1995 in Kiev, Ukraine, it released titles such as Cossacks: European Wars, American Conquest, Alexander, S.T.A.L.K.E.R.: Shadow of Chernobyl, S.T.A.L.K.E.R.: Clear Sky and S.T.A.L.K.E.R.: Call of Pripyat. In 2004, GSC Game World founded the publishing branch GSC World Publishing.
GSC Game World's most successful game series is Cossacks, but it is also known for S.T.A.L.K.E.R.: Shadow of Chernobyl, a survival shooter which was in development for seven years and which was released in March 2007. Most of its titles are published in Europe by cdv Software Entertainment.
GSC Game World is also the creator of the X-Ray Engine used in the S.T.A.L.K.E.R. serie.