The Cypher system is the driving force behind the award-winning RPG Numenera. Its design is quick and focused on storytelling, encouraging the creation of inspired and collaborative characters. This new core library replaces and expands the original rulebook of the Cypher system. It is improved and different - but it is not a second edition. The rules have not changed, and all existing supplements of the Cypher system (including titles for The Strange and Numenera) remain fully compatible with this new core library.