The Transformers One Sourcebook brings your Transformers Roleplaying Game to Cybertron as the inciting moves of the Civil War occur! Join the ranks of bots fighting for a better future or take up the banner of the High Guard in their rebellion against Sentinel Prime with new factions representing the beginnings of the Autobots and Decepticons. Work alongside or battle against the film’s starring characters as you forge a new future for Cybertron with the Matrix of Leadership. Whether you want to play out the events of Transformers One with your group or use the film as a starting point for further adventures, this book has everything you need.