Unnatural Selection (itch) (Phing1337, mrpossoms)

Welcome to the human body. You are an immune nanobot that has to protect an immune systems lymph nodes from threats of ever evolving viruses. Use WASD to move. change guns with 1,2,3 In Unnatural Selection, viruses evolve. Tthe most successful viruses grow each generation to better ward off your attack. No two games are alike.