Canon is what is accepted as 'truth' in The Godfather universe. Material appearing in the original novel and the films takes precedence over the sequel novels. The video games are not considered canon.
Canon is contrasted with Fanon.
Canon hierarchy system
- Mario Puzo's The Godfather and The Godfather Trilogy.
- Additional information on the supplements disc of the DVD and Blu-ray.
- The final screenplay drafts of the films.
- The Family Corleone — based on an original screenplay of Mario Puzo.
- The Godfather Returns.