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

Our newly-released Cthulhu by Gaslight Investigators' Guide brings the dark shadows of the 1800’s to your gaming table. While predominately set in the British isles, the Cthulhu by Gaslight era also e

ISLE OF MADNESS is a hair raising 1930's adventure that takes place on a secret island hidden in the North Atlantic Ocean—and is the first scenario for Pulp Cthulhu in the Miskatonic Repository, Ch

We are so excited to announce our official RuneQuest Stream! Join our stellar cast from Monday, February 14th at 3PM Pacific, at Chaosium Twitch for our roleplaying game of heroic fantasy rich in magi

"The one thing I've got to say about the Jonstown Compendium on DriveThruRPG, the supplements top tier – they are practically indistinguishable in terms of layout from fully professional releases." — 

Create. Explore. Play. BRP’s Universal Game Engine is available royalty-free for personal and commercial use under the Open RPG Creative license, aka ORC license. Basic Roleplaying (BRP) is a system

The 'Unnatural Selections' series is our regular round up of notable Chaosium reviews worth a look.In the six months it's been out, critics and fans alike have heaped praise on the RuneQuest Starter S

By Jason Durall, RuneQuest creative directorThe Starter Set for RuneQuest: Roleplaying in Glorantha is coming! Between now and its release later this year, RuneQuest creative director Jason Durall's D

The Jonstown Compendium is Chaosium's new community content resource for RPG content set in Greg Stafford's mythic universe Glorantha. Journey to Jonstown is our regular update of new titles - see the

From our Fan Use and Licensing Q&A: Q: What does YGWV (“Your Glorantha Will Vary”) mean? How does this apply to fan and licensed products? A: Glorantha is one of the oldest and most influential fantas

For the second year, Chaosium offers UK Games Expo attendees a Cthulhu workshop, games, and a glimpse at Glorantha. Plus the latest releases at the Chaosium Booth, including Pulp Cthulhu, Doors to Dar

Significant Streams is a feature on the Chaosium news blog where we highlight actual play streams, podcasts, and YouTube channels featuring Chaosium games that we think are worth checking out. By Bri