Five Parsecs From Home
Dice (Percentile) GM-less (No gamemaster needed to play) Trait / Aspect Based (personality affects gameplay)
Five Parsecs From Home is a science fiction adventure game aimed specifically at solo-players, though it can be played with a friend just fine.
Build a crew, outfit them and take to the stars. Undertake odd jobs for shady characters, get in gun battles, make a few bucks and die in some place nobody wants to visit.