The Kingdom of Champions Sourcebook is a role-playing game supplement created by Hero Games. It is designed for players and game masters looking to enhance their super hero-themed campaigns with additional rules, setting details, and character options. This sourcebook is part of the Hero Games product line and is specifically tailored for games focusing on the Kingdom of Champions setting. With a variety of content and creative ideas, this product helps to expand the gameplay experience for fans of super hero role-playing games.