Written as an experiment is creating a complete RPG in the shortest period of time, this little game turned out to be both fun, easy to learn, and even easier to play.
First published by ID Adventures, it is now available again through NUELOW Games. And you can have a copy for a mere $1.25 by clicking here. It's got everything a core RPG rulebook must have: Character generation rules, combat system, player rewards system, a GM-only section including monsters, and an illo of a scantily clad babe!
Steve Miller's 30-Minute Roleplaying Game: The Best RPG Designed in Less Than an Hour!