Call of Chernobyl is a free-play sandbox mod for S.T.A.L.K.E.R. : Call of Pripyat created by TeamEPIC.Play the 3 games in order of release (Shadow of Chernobyl, Clear Sky and Call of Pripyat) then come back for the mods. Note**: If this is your first playthrough, it's not recommended to use any of these mods.Mod DB has an large list of mods available for S.T.A.L.K.E.R.: Call of Pripyat.