@PCGamer Stalker: Call of Pripyat now has a time travelling mod called Wind of Time which sends you back to 2014 to prevent the apocalypse. You can find the mod at Moddb.
More information."The main action takes place in 2014 and represents the continuation of the original trilogy," explains akmc47u on the mod's ModDB page. "The plot of modification does not lead a player on rails. When you complete the basic tasks, new levels open with additional tasks, some of which [take] players to unique locations."