Double Fine Productions - the developer behind Psychonauts, Brütal Legend and other fine games - has released a new game called Spacebase DF-9, a simulation game set in outer space where you build a space station for humans and aliens. The game is still in development, but is already getting an early release through Steam as part of Steam's Early Access program. It's available for Mac, Windows and Linux.
A sort of SimCity in space, Spacebase DF-9 has you laying out the basics for your space station, providing suitable accommodations designed to meet all the needs of wayward space travelers. You mine asteroids for resources, discover derelicts and handle crises like meteor impacts, explosive decompression and the occasional alien invasion.