Cortex: Role Playing Game System by Margaret Weis Productions Staff is a 2010 game publication in English language. The book features a comprehensive role-playing game system and is centered around the fantasy genre. Published by Margaret Weis Productions, LTD., the book contains 163 pages filled with rules, guidelines, and creative gameplay ideas for immersive role-playing experiences. With a format designed for gameplay, this book is a valuable resource for players and game masters looking to enhance their gaming sessions with a rich and engaging system.