STALKER - PreSky is a Total Conversion Freeplay mod set before the events in the original Clear Sky. Changing various gameplay elements, and introducing new ones, PreSky breaths new life into the Zone, without storyline progression. There is no real storyline, except what exists in your messages log. You are virtually free to do what you will within the zone. Ideas and game elements have been brought from STALKER - Shadow of Chernobyl and STALKER - Call of Pripyat and have been merged into what this mod gives, to create hopefully a truly unique experience and game within the Zones boarders.