Living on the moon is a hard job, but somebody has to do it! Explore the moon while mining for resources, forging materials and tools, and building lunar outposts and vehicles. You will meet many other people on the moon and build colonies from the ground up. Be careful though, they might not all be friendly. The game features large randomly generated environments which can be manipulated by the players in every way.
I think it has lots of potential and also taking into count that it's free!
Only problem seems to be connecting just at the moment. Hope going to be fixed soon!