Biosphere Simulator is a planetary god game sandbox in which players guide a barren volcanic world through billions of years of evolution. Players shape the atmosphere, carve oceans, and seed the first microbes, then watch ecosystems, species, and civilizations develop across three eras: Geological, Biological, and Technological. Features include procedural world generation, a DNA and mutation engine spanning 48+ species, ecosystem and atmospheric simulation, emergent civilizations, and god powers such as asteroids, volcanic eruptions, wildfires, and rainstorms.