Winter!: Prepare for holiday gaming!
This simulator lets you build star systems, then watch your planets hurl each other into deep space. You can also collide galaxies. You can blow up planets or watch them grow as they swallow asteroids and moons. You can collapse the sun into a black hole or expand it into a red giant. There are achievements for things like hurling the Earth into the sun and finding a way to freeze it solid. It other words, you get to play with gravity!
- Avatar Aang
Game Traits applied to Universe Sandbox (PC) by LordXenophon