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From our talented friends at Type40: Extremely limited editionOnly 50 made, numbered from 1 to 50 on the inside. 50th AnniversaryDesigned specifically to carry and protect your Chaosium rule books. Beautiful and hard wearingHigh quality, handmade. These will last for decades and age beautifully. A … read more

For immediate release. Ann Arbor MI, Friday June 6th 2025 We're pleased to announce some new staffing changes: Neil Robinson, Chaosium’s chief operating officer (COO) has stepped up to the position of Chief Executive Officer (CEO), a new position in the company. As CEO, Neil leads the company … read more

Now available at Chaosium's Redbubble store: our Official 50th Anniversary Logo t-shirt! Available in a variety of styles and sizes from S to 5XL.#weareallus … read more

  On Sale Now! CALL OF CTHULHU LIVE is a one-shot live actual play of the world's foremost game of horror and mystery. Keeper of Arcane Lore Mark Meer and an all-star cast of investigators – Samantha Béart, Jasper Cartright, Johnny Chiodini, Belinda Cornish, and Josephine … read more

  We have a lot in store for you for the first half of 2025!   JANUARY – Jimmy's Last Dance for Rivers of London the Roleplaying GameFEBRUARY – QuestworldsMARCH – Gamemaster's Handbook for PendragonMARCH – Keepers' Guide for Cthulhu by GaslightAPRIL – Cult … read more

    Applications for the Chaosium 50th Anniversary Convention Support Pack are now closed.    Thank you to the several hundred TTRPG conventions around the world that applied. We'll be in touch with next steps soon! … read more

UPDATE: APPLICATIONS FOR THE 2025 CHAOSIUM 25TH ANNIVERSARY CONVENTION SUPPORT PACK CLOSE ON JANUARY 31ST AT 11.59PM PT.Attention convention organizers! Since the beginning of our hobby half a century ago, conventions big and small have been a vital part of a thriving tabletop gaming community. … read more

Ab Chaos is the email newsletter for Chaosium fans, with information about our games, new products and special offers.The original Ab Chaos was an irregular newsletter brought out by Chaosium from 1990 - 1992, back in the days when if you wanted one you had to send in a SSAE (stamped, self-addressed … read more