The Hero System is a generic role-playing game system that was developed from the superhero RPG Champions. After Champions fourth edition was released in 1989, a stripped-down version of its ruleset with no superhero or other genre elements was released as The Hero System Rulesbook in 1990. As a spinoff of Champions, the Hero System is considered to have started with 4th edition, rather than on its own with a 1st edition. However, the first three editions of the game are typically referred to as Champions, rather than the Hero System, as the game for its first three editions was not sold as a universal toolkit, instead largely focusing on superheroes.

Champions is a role-playing game published by Hero Games designed to simulate a superhero comic book world. It was originally created by George MacDonald and Steve Peterson in collaboration with Rob Bell, Bruce Harlick and Ray Greer. The latest edition of the game uses the sixth edition of the Hero System, as revised by Steve Long, and was written by Aaron Allston. It was released in early 2010.