From THQ: The world's worst nuclear disaster occurred in 1986 at the Chernobyl power facility in the Ukraine. The explosion left a vast "Exclusion Zone" plagued with deadly energy disturbances capable of killing instantly. This zone grew over time, and by 2012, specially equipped scavengers, known as S.T.A.L.K.E.R.'s, venture into the zone to claim radioactive artifacts for the black market. While rival S.T.A.L.K.E.R.s, soldiers and mutant creatures battle for survival, the true nature of Chernobyl's dark past and horrific future are revealed.