How quickly would Earth be swallowed by a black hole near Mars? See for yourself. It simulate gravity, climate, colossions, and a variety of cosmic phenomena, relying on you to come up something to do with that.
Universe Sandbox ² (no, i don't know why it's not 2) is very much a sandbox, focused on letting you play with the cosmos as you please. Rebuilt and expanded in a new engine, the cosmic simulator sequel last night launched on Steam Early Access. What will you think when I plop another Moon into the night sky, drop a supernova behind Pluto, or extinguish the Sun? Y'all had better hope that, if I ever achieve godhood, I'm too distracted by Universe Sandbox ² to notice.
I might, however, be tempted to dick about with cosmic powers and portents. I wouldn't go poking around inside your head or turn you into a heifer.
