Thrive is a game about the universe - we want to let you play however you want, make whatever you want, and live however you like. Thrive will be a free, open-source game created by an online community of dedicated volunteers. Our team seeks to accomplish two major goals: create engaging, compelling gameplay that respects our players' intelligence, and remain as accurate as possible in our depiction of known scientific theory.
The latest version of Thrive, including procedural membranes, organelle models and much more, is now available on ModDB. The last download here was posted over five years ago, but we've had plenty of progress since that's so far been uploaded elsewhere.