A awesome little gem of a game currently in development as a free downloadable version for now. At best what you can try to do is either put something into stable orbit or have fun crashing it =P
Plenty of mods(extra parts) available on online
BUT BE WARNED! this is a extremely addictive game, DL at own risk <_<
game: Kerbalspaceprogram.com
mods: Kerbalspacerepository.com
I have enough addictions already Lol
ModDB Roleplay
Dark Orbit
And beer of course.
hmmmm how is Dark Orbit?
Not really the best looking game, but's it fun enough to game when you are bored :P
Btw. Log on Msn.