Chaosium

Encountering the King in Yellow in 1980s Japan Forgotten for centuries, the Sutra of Pale Leaves has resurfaced in 1980s Japan—a time of excess, co...

The Classic Call of Cthulhu campaign spans the European continent in luxury! Horror on the Orient Express is back in print with a reformatted two-v...

Over 550 spells of dire consequences, secrets, and unfathomable power! Contained within are gathered spells drawn from over thirty years of Call of...

Death and Discovery in the Vermont Hills! In 1929, a student died during an expedition in the Vermont Hills. One year later, the Miskatonic Univers...

Five scenarios of Cthulhu Mythos terror designed for new players and keepers! What's Inside? Doors to Darkness is a collection of five scenarios fo...

Two One-to-One Scenarios for Call of Cthulhu Does Love Forgive? is a collection of two special scenarios for Call of Cthulhu for one Keeper and one...

Collected Wisdom on Running Games! A gathering of wisdom, advice, and tips from Keepers for Keepers of the Call of Cthulhu roleplaying game. What's...

Solitaire Adventure by the Lakeshore! What has Professor Harris’ research got to do with the strange green fog enveloping the town? Who are the men...

Two unsettling encounters on the road With the rise of the automobile in the 1920s, people were no longer tied to the railways as a means of gettin...

Unveiling the Mythos in Weimar Germany In the aftermath of the Great War, Berlin has a reputation for licentiousness. A place where anything may be...

Cthulhu Dark Ages is a world lit only by fire. The ancient empires collapsed centuries ago, taking their culture and learning with them. It’s a dar...

Troubles Afoot! Best put a round in that iron and make haste! Down Darker Trails takes your Call of Cthulhu games to the badlands of America’s wild...

Six Scenarios Against The Unknown! The denizens of Nameless Horrors are unlike anything you’ve encountered before. Each is truly of the Cthulhu Myt...

Cthulhu Calls! At long last, the intricacies of the nefarious Cthulhu cult are revealed! What’s Inside? Cults of Cthulhu gives you the rules to inj...

Who Knows What Happens... Behind Closed Doors Mansions of Madness Vol. 1 contains five scenarios for use with the Call of Cthulhu Starter Set or th...

Basic Roleplaying: Universal Game Engine is the definitive core rulebook for the renowned D100 system that powers classics like Call of Cthulhu and...

The Basic Roleplaying: Gamemaster Pack is the ultimate accessory for BRP GMs and creators. Featuring a 3-panel GM screen with full-color artwork an...