This gorgeous 336-page hardcover book is the first core rulebook for the Cosmere RPG. It includes all the rules that every player and GM needs to build characters and run adventures in the world of Roshar! The Cosmere Roleplaying Game uses an original system designed for a broad range of players, from roleplaying novices to avid TTRPG hobbyists. The system's core mechanic is simple: roll a 20-sided die, add a relevant skill, and try to beat a certain difficulty number. But beyond that familiar rule, just about every aspect of this system has been purpose-built to tell Cosmere stories. Some of the system's rules are subtle upgrades to traditional d20-based play, while other innovations are more obvious.