Champions was the superhero role-playing game put out by Hero Games. The first three editions were standalone games using the Hero System. The fourth edition was renamed Hero System and Champions was created as a campaign sourcebook. Champions continues to be used as the superhero genre sourcebook for fifth and sixth edition Hero System.
Champions Complete for sixth edition is "Everything you need, in one book," as it was in first through fourth editions.
Champions Now is a re-imagining of first through third edition Champions by Ron Edwards.