Lately I heard of this extremely interesting RPG "Mothership":
http://www.tuesdayknightgames.com/mothership
It's a sort of sci-fi horror RPG " where you and your crew try to survive in the most inhospitable environment in the universe: outer space! You'll excavate dangerous derelict spacecraft, explore strange unknown worlds, exterminate hostile alien life, and examine the horrors that encroach upon your every move."
I'd love to play a couple of scenario, a la' Alien, but have not found a GM so far. Is there anyone interested?