S.T.A.L.K.E.R. : Shadow of Chernobyl is a first-person shooter survival horror video game developed by GSC Game World and published by THQ .
S.T.A.L.K.E.R. : Shadow of Chernobyl , previously known as S.T.A.L.K.E.R. : Oblivion Lost , is a post-apocalyptic first-person shooter video game by Ukrainian developer GSC Game World .