From the introduction:4C is a RPG toolkit rather than complete game system it provides a foundation for you to build upon. As presented, 4C is speciically for superhero roleplaying though it could be adapted to other genres with a bit more work.User summary:This is the core rules book for the 4C system. It includes a book of rules and the required master chart. The system appears to be an open reimplementation of the FASERIP system used by Marvel Superheroes. - BoardGameGeek