: A free, open-source simulation where you play as a fledgling AI trying to survive and evolve without being discovered by humans.
Because the game is older, it often goes on sale for a few dollars.
: Best for modern PC compatibility, as GOG versions are typically DRM-free and optimized for newer Windows versions.
: A free-to-play educational clicker game that follows the history of evolution from the early solar system to the future.