An "old school" space opera game with an intriguing mechanism for generating a campaign background. Stars without number is an ideal light to medium weight RPG not least as the price is right so that every player can have a copy of the rules to refer to which can also spark story ideas from other players. On the downside there is no real explanation of how much experience points to reward characters with in a given situation, leaving it to the referees discretion. A good solution could be to encourage PCs to define their goals and reward them for meeting these.