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 films 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 including: Stats for Orion Pax/Optimus Prime, D-16/Megatron, Elita-1, B-127, Sentinel Prime and his minions, and a mix of bots and Transformers key to the film and the Cybertronian Civil War. New Influences inspired by heroes and villains, and new options for using your crew capacity. How to play a Bot character and ways to get your own Transformation Cog. Guidance for playing allies-to-enemies, traitors, and other complicated party dynamics. Ready-to-go locations from across Cybertron, ranging from the Archives to how to run your own Iacon 5000, perfect for every Transformers RPG campaign.