This product includes Natural Selection 2 PC. The top 3 reasons to play Natural Selection 2 PC Natural Selection 2 pits alien against human in an action-packed struggle for survival. Choose to evolve into one of five lifeforms: The fast, fearsome Skulk can run on walls and deliver massive damage with its jaws. Natural Selection 2 comes with all the tools we used to make the game. All game code is open source. About Natural Selection 2 PC Natural Selection 2 pits alien against human in an action-packed struggle for survival. Wield devastating weaponry as a Frontiersman marin