Star Legion

From the book introduction: Star Legion: Sci-Fi Adventure™ is a simple-to-learn roleplaying game where players take on the roles of naïve heroes, bizarre aliens and jaded pilots in a science fiction movie. It assumes the players and ref already have some rudimentary experience with role-playing. Its meant to be played in the vein of Star Wars, Star Trek, The Last Starfighter, Enemy Mine and even anime staples like Starblazers and Robotech, so keep it light (yet adventurous).