Thrive is an opensource evolution games inspired by spore and infact can trace back it's origin to sporum. Currently it's in very early development in that only the first stage is actually functional from a gameplay standpoint. The game obviously starts you off as a cell and so far simulates everything from thebplanet generation, population and evolution of different species of cells, predation and many more. The game has plans for 3d multicellular animal stages you will be avle to play as a static plant too to spacefaring civilization and to a sandbox stage where your species ascends and becomes a god. These later stages are in the game but only as prototypes. https://www.revolutionarygamesstudio.com/downloads