What's the dragon actually hoarding?
What part of the starship just went dark?
Where did those bites come from?
Whose fingerprints are all over the crime scene?
What's the superhero's weakness?

Roll XX is a book of random tables for fantasy, sci-fi, superheroes, and horror role-playing games. Packed with adventure hooks, story seeds, NPCs, magic items, spaceships, demons, and locations, Roll XX features 90 questions and 1800 answers.

And it's open-source!