S.T.A.L.K.E.R.: Call of Pripyat is now available on Steam! If you currently own either S.T.A.L.K.E.R.: Shadow of Chernobyl or S.T.A.L.K.E.R.: Clear Sky you will receive the game at a discount, otherwise you will receive the game at the standard price. This loyalty promotion is indefinite! S.T.A.L.K.E.R.: Call of Pripyat takes PC gamers once again into the vicinity of the Chernobyl nuclear reactor that exploded in 1986. This so-called "Zone" is a highly contaminated area cordoned off by the military and now is combed through by the so-called stalkers, modern fortune hunters, in search of unique artifacts.