A free terraforming simulator.
A little space to wonder.

Genesis is an interactive planet sandbox. Shape the terrain, experiment with sunlight and atmosphere, and watch a simplified biosphere respond. Try terraforming a Mars-inspired world, thawing an ice planet, or building your own New Eden.

An imaginative, simplified simulation — not a scientific climate model or weather forecast. Planets are procedurally generated; the Mars scenario is inspired by Mars, not a geographic replica. No account or download needed.