In.
SPAAAAAAAAAAAAAaaaaace!
So, @Dutch_Law implied that I should try out Blood In Space. I already owned it, but hadn't played it yet (after all, I have plenty of games to play already). Blood In Space is a solo or cooperative game of sci-fi shoot-em-up. It comes with a few pregenerated characters, but you can make your own. It also has a campaign system of interlocking scenarios, which is nice for a solo game.