Stormbringer is a game I’ve always wanted to play but never got the chance (along with Pendragon I think it was called?).
Starblazer Aventures? You mean like the old cartoon Starblazers? That would be pretty sweet!
Stormbringer is pretty old; actually, that was the first fantasy game that got my mind out of the dungeon (and into running "real" plots). It used a variant of the old runequest system (so basically, it's D% rollunder mechanics all the way) and the early editions were notorious for (randomly) creating totally unbalanced player groups. ("That guy? He's a one-legged begger from Nadsokor. And the one besides him? A melnibonéan sorcerer-prince who is 6th in the line for the throne...I'm sure you'll fit right in.").
A nice side effect was the exposure to classic Sword&Sorcery literature - Conan, Elric, Fafhrd and the Grey Mouser, Kull, Kane...I had stumbled on a cornucopia of cool stuff, and most of it was available straight from my local library back then.
Pendragon was interesting, but didn't gel with us way back when ("Whaddya mean...my character is too old to go adventuring? He still kicks ass, statwise.." "Oh, that..yeah, it's winter, roll for stat loss, gramps..."). In restrospect, it's still a good system - lots of great ideas behind it (like that damage isn't based on the weapon, but on the guy swinging it, as well as the personality system. Good stuff!)
Starblazer Adventures is based on a british comic named Starblazer (no "s"!), however - you could say that one was the british equivalent of the Heavy Metal Magazine, with more emphasis on action than on scantily-clad females. The guys over at Cubicle 7 got the license and made a remarkable RPG out of it. You can take a look at it
here. Since I'm mentioned in the credits (mostly for errata), I'll leave it at that. It's a pretty generic SF-system, so I'm rather confident it could do Starblazers, too.
-Silver