For more than forty years, Chaosium has captivated gamers, readers and mythic adventurers worldwide. Our award-winning roleplaying games, board games, and fiction are praised as being some of the most engaging and innovative of all time.

Using History in Game Writing: a panel from Chaosium Con Australia 2024; Chaosium statement about Tariffs - 4 April 2025; Chaosium's Jason Durall is a special guest at LuxCon (Luxembourg, April 12-13) Connect With Us. Newsletter Signup. Be the first to hear our latest news and updates.

The Chaosium lets us dream the dreams of dead gods and construct the universe out of its essential runes. It lets us travel along the Lightbringers Quest to revive the murdered sun or walk the non-Euclidean pathways of R’lyeh’s nightmare corpse-city.

CALL OF CTHULHU 7TH EDITION is the latest iteration of Chaosium's revered roleplaying game of investigation and horror set in the 1920s. Looking to get started? Check out the Call of Cthulhu Starter Set.

2025年4月1日 · With Chaosium Con US in Ann Arbor MI now just weeks away, let's fondly remember the first-ever Chaosium-themed convention — GorpCon, held on this day forty-four years ago. Taking place in the Grande Ballroom of Oakland's Hotel Milton, it is said to have attracted fans "fro … read more

Chaosium's Jason Durall is a special guest at LuxCon (Luxembourg, April 12-13) Watch the Pendragon Gamemaster's Handbook AMA; Connect With Us. Newsletter Signup. Be the first to hear our latest news and updates.

Explore a World of Myth and Magic! RuneQuest is a roleplaying game of heroic fantasy rich in magic, mystery and extraordinary adventure, set in the world of Glorantha.. RuneQuest is filled with mortals and gods, myths and cults, monsters and heroes. The most powerful building blocks of the universe are the Runes, mystical symbols that …

Shop for Call of Cthulhu products (found at Chaosium.com and your local gaming store)

Call of Cthulhu uses Chaosium’s Basic Roleplaying: Universal Game Engine—a skill-based system with a focus on character development and simple mechanics. Basic Roleplaying uses a roll-low percentile (D100) system to determine success and failure: a Stealth skill of 50 means you have a 50% chance of success.

2024年9月16日 · Coinciding with the 40th anniversary of the ElfQuest RPG, Chaosium will be launching a Kickstarter campaign in October 2024 to bring back the vintage game in its original box edition format with the later supplements included.