SpaceStationSim, from Vision Videogames in collaboration with NASA, gets you up close and personal with your own crew of astronauts who live and play in outer space. Build your own International Space Station with loads of modules and cool components. Send your astronauts on EVA missions, and perform experiments in micro-gravity. Keep them happy and healthy, but look out for that bumbling space tourist. He will wreck your station if you let him.