https://github.com/Revolutionary-Games/Thrive
This entertaining game aims to be a scientifically accurate evolution game, starting off as a single-celled organism and growing into more complex organelles, competing against other organisms in the environment.
https://store.steampowered.com/app/1779200/Thrive/
It is still in active development and later stages aren’t fully fleshed out yet but the early stages can still provide a few hours of fun.
Got it on my wishlist for a long time but it doesn’t seem to offer much, not even for its 4 bucks. And there’s not really any decent gameplay videos out there either.