Galimulator Pre-Installed Game
In Emperor mode, you can control your own empire by using your Flagship to boost expansion and defense, build and control your ships, and manage your Spy network. In Sandbox mode, you have full freedom to do pretty much what you want. Make empires degenerate, throw meteors at them, etc. Or you can just observe, like an aquarium, except with interstellar space empires instead of fish.