Since a year after first surge, the territory, guarded only by several military units becomes more and more dangerous. Scientific and military expeditions are sent to investigate the causes of the unknown nature, but disappear.
Paradise Lost - a modification for the game S.R: Shadow of Chernobyl, developing since based on the recovery of content that is not ranked to the final game.
S.T.A.L.K.E.R.: Call of Chernobyl mod - Mod DB
The aim of this mod is to add in the old locations from ShoC and Clear Sky, and to provide an enhanced and extended gameplay experience while (mostly) sticking to the vanilla storyline. At this point, the mod alpha)contains 37 locations total.