A Companion to SuperworldA Companion to Superworld is a 1984 role-playing game supplement published by Chaosium for Superworld.ContentsA Companion to Superworld is a supplement in which the game is expanded with new and variant rules, additional superpowers, and details of a superhero headquarters. It also introduces rules for weather and weather-based abilities, along with guidelines for converting Superworld characters to the Champions and Villains and Vigilantes game systems.Publication historyA Companion to Superworld was written by Steve Perrin and published by Chaosium in 1985 as a 72-page book.