Santa Claus Conquers the Martians: The Official Series Bible is a setting based on a (fictional) television series based on the original film. Players take the role of human, elf, and Martian toymakers, working together to bring peace and understanding while foiling the schemes of naughty people from both planets. It is system-independent, meaning you can use the roleplaying game mechanics of your choice to play it. It’s good for a silly one-shot or a short campaign.
The Official Series Bible™ is a format for roleplaying game campaigns. Each setting is called a Pilot, like the first episode of a television series, providing enough information to get started and offering hooks for future adventures, be leaving things open enough for gamemasters to take things in their own direction. All information is presented without rules system information, so you can adapt it to the system of your choice.