The Judge Dredd RPG Judges' Handbook MEGA CITY ONE is a trade paperback book published by Mongoose Publishing in 2010. This role-playing game guide, written by Simon Beal, is part of the 2000AD series and is focused on the topic of role-playing and fantasy. With 160 pages, this handbook provides players with detailed information on the Justice Department and allows them to immerse themselves in the world of MEGA CITY ONE.