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Chaosium, (kay-OSS-ee-yum) is known for publishing high quality books & games, and for having a well-developed sense of fun.

In 1975 we were founded as The Chaosium. In 1980 we incorporated as Chaosium Inc. Chaosium thrives in the mild climate, gorgeous surroundings, and gentle earthquakes of the San Francisco Bay Area.

Our main office is in Hayward, located about half-way between San Francisco and San Jose. A short walk away is a very good micro-brewery (and one of the oldest!) and Charlie Krank’s home. Charlie is our president and resident BBQ expert.

Most of Chaosium's product lines are based upon literary sources. H.P. Lovecraft's 1920's horror fiction provides the basis of our classic Call of Cthulhu roleplaying game line which has won so many awards that we have lost count, though we do know that there are more than 70 of them. Mr. Lovecraft also provides the inspiration for our many Chaosium Fiction collections. We are now expanding our fiction offering to include other, related, genres.

 
 Hottest Fantasy, PDF from Chaosium

 
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Basic Roleplaying

Basic Roleplaying


The Chaosium System Welcome to Chaosium’s Basic Roleplaying system, a book that collects in one place rules and options for one of the original and most influential role playing game systems in the world. This book comprises a roleplaying game system, a framework of rules aimed at allowing players to enact a sort of improvisational radio theater—only without microphones—and...   [click here for more]
Chaosium  $39.95 $21.97

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Basic Roleplaying Quickstart Edition

Basic Roleplaying Quickstart Edition


In this BRP Quick-Start booklet, Chaosium has collected the essential Basic Roleplaying rules for a quick introduction to one of the most influential roleplaying systems in the world. Basic Roleplaying was designed to be intuitive and easy to play. Most Basic Roleplaying mechanics are simple and logical. Virtually all rolls determining success or failure of a task are...   [click here for more]
Chaosium   FREE 

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Aces High New Mexico

Aces High New Mexico


Welcome to New Mexico 1875! Land of Enchantment Aces High: New Mexico, Dark Days in the Land of Enchantment, is a companion book for Chaosium‘s Aces High BRP supplement. Aces High: New Mexico is split into two sections; the first section is concerned with historical, geographical and societal issues that will allow the Master to explore...   [click here for more]
Chaosium  $11.95

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Advanced Sorcery

Advanced Sorcery


Demons, Necromancy & High-Level Magic The worlds of fantasy are vast and diverse. Whether steeped in philosophy and existentialism, or action and carnage, the one commonality to all tales of fantasy is the influence of the supernatural on the natural world. Mages, wizards and sorcerers force the world to bend to their will. They grab the the fundamental essence of the universe and force...   [click here for more]
Chaosium  $23.95 $13.17

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All the Worlds' Monsters Vol. 1

All the Worlds' Monsters Vol. 1


This book is an encyclopedia of the strange, the bizaare, and the deadly. It contains complete statistics for 265 monstrous and dangerous creatures, created by dungeon masters across the United States and Canada. Each monster is rated for hit dice, armor class, movement, whether and how well it swims and flies, its intelligence range, dexterity, alignment, normal habitat, the probability of it being...   [click here for more]
Chaosium  $10.00 $5.50

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All the Worlds' Monsters Vol. 2

All the Worlds' Monsters Vol. 2


In its third printing, volume II of the ALL THE WORLDS’ MONSTERS series contains 243 creatures from literature, fantasy, and nightmare. Included is a conversion article by Ken St. Andre for TUNNELS & TROLLS, and Steve Perrin’s historic “Conventions.” Created by 54 DMs from across North America, each monster is rated for hit dice, armor class, movement, whether or how well...   [click here for more]
Chaosium  $10.00 $5.50

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All the Worlds' Monsters Vol. 3

All the Worlds' Monsters Vol. 3


Now! The long-wanted 3rd volume of the All the Worlds’ Monsters series is here-112 pages packed with monsters and play-aids. Included are 238 new monsters, an all-series index, a RuneQuest stats conversion essay by Steve Perrin, and grouping lists by monster type, level, and appearance. The stats were created by dungeon masters from across the United States and Canada. Each monster is rated for...   [click here for more]
Chaosium  $10.00 $5.50

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Astounding Adventures

Astounding Adventures


Pulp Adventures for Basic Roleplaying Welcome to the heart-pounding, two-fisted, action-filled world of the Pulps! Throughout this book you will find Basic Roleplayingrules for new character types, skills, combat, magic, mad science, and a plethora of villains, henchmen and monsters. Accompanying the text are several sidebars containing special, optional rules to...   [click here for more]
Chaosium  $20.95 $11.52

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Basic Creatures

Basic Creatures


A Basic Array of Creatures, Critters, and Monsters This work presents an assortment of creatures useful to players of Basic Roleplaying. These critters are drawn from a variety of eras and genres of fantasy and fiction, including: Allosaurus, Baboon, Bandersnatch, Basikisk, Bear, Behemoth, Brontosaur, Centaur, Crocodile, Duck, Dwarf, Elemental, Elf, Ghost, Giant, Gorgon, Griffin, Halfling, Harpy,...   [click here for more]
Chaosium  $4.95

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Basic Gamemaster

Basic Gamemaster


Running the Chaosium Roleplaying System This book provides wisdom and advice on running Basic Roleplaying games. There are five main sections: the first discusses the duties of the gamemaster in devising and presenting roleplaying adventures. The second covers scenario-construction aids for the gamemaster including encounter tables, languages, treasures, and danger-classes. The third treats...   [click here for more]
Chaosium  $4.95

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Blood & Badges

Blood & Badges


The year is 1855. Perfection is a small gold-mining town located on the east side of the Rocky Mountains, in the Kansas Territories. The state of Colorado has not yet been established. The impetuous daughter of a rail-baron left home to experience the Western Frontier. For three months there has been no word from her. Pinkerton Agents are now on the case, hired to find Victoria Featherstone amid the...   [click here for more]
Chaosium  $10.95

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Blood Tide: Black Sails & Dark Rituals

Blood Tide: Black Sails & Dark Rituals


Black Sails & Dark Rituals THE GOLDEN AGE OF PIRACY is a time when men turn their hands against each other and the seas and coasts are splattered with blood. The wars that ravaged Europe are over, but peace brings new problems. Thousands have been displaced or orphaned, their homes and lands ruined or claimed by others. Many thousands more see their livelihoods as soldiers and...   [click here for more]
Chaosium  $34.95 $16.95

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BRP Adventures

BRP Adventures


BRP ADVENTURES presents thirteen adventures for the Basic Roleplaying system. These are drawn from the submissions for the first Basic Roleplaying Adventure Contest. Organized by genre, these stories illustrate the versatility of BRP and its adaptability to different kinds of storytelling. The following are the general genres and adventures included: FANTASY * Sharazar,...   [click here for more]
Chaosium  $13.95

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BRP Witchcraft

BRP Witchcraft


The village wise-woman creating herbal mixtures to cure her neighbours of the latest plague to curse their homes, the crone who disguises herself as a beautiful young woman to entice men to their doom, the travelling warlock who trades in potions and talismans which may or may not be truly magical. These are all examples of witches; men and women for whom witchcraft is an art and a profession. Within...   [click here for more]
Chaosium  $7.95

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Classic Fantasy

Classic Fantasy


Return to the dawn of role playing with Classic Fantasy. Explore dungeons in your quest for treasure, fight terrifying monsters, and cast powerful spells of destruction. Classic Fantasy expands on the core Basic Roleplaying rule book with... 7 playable races: Human, Dwarf, Elf, Gnome, Halfling, Half-Elf, and Half-Orc, all with detailed racial abilities. 10...   [click here for more]
Chaosium  $16.95

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Dust to Dust

Dust to Dust


EXPLORING THE DARKER SIDE OF HUMAN NATURE This is a supplement to Ashes to Ashes, a Basic Roleplaying setting that casts the players as mavericks in a fantasy world that is losing a war it doesn't know it's fighting. Hidden demons and their mortal minions manipulate events from the shadows, experimenting with social mechanisms to steer their human cattle in any direction they want them...   [click here for more]
Chaosium  $10.95

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Fractured Hopes

Fractured Hopes


An Introduction to the Sundered Earth Fractured Hopes began as a challenge. It began as a thought experiment. I had an advanced reader's copy of the BRP core book, and I thought it would be interesting to write a setting in which everything in the core book had some presence in the world. I saw it as a companion to the BRP rulebook, something that would allow players and gamemasters...   [click here for more]
Chaosium  $10.95

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H.P. Lovecraft's Dreamlands

H.P. Lovecraft's Dreamlands


Roleplaying Beyond the Veil of Sleep We all dream . . .   For some, dreams can become reality. H.P. Lovecraft's Dreamlands provides everything needed for Call of Cthulhu or Cthulhu Dark Ages investigators to travel down the seven hundred steps, through the Gates of Deeper Slumber, and into the realm of dreams. Includes a travelogue of the Dreamlands, a huge...   [click here for more]
Chaosium  $34.95 $19.22

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In Search of the Trollslayer

In Search of the Trollslayer


A Heroic-Level Adventure for Basic Roleplaying THREE HUNDRED YEARS AGO a brave human hero named Sir Tolwar was slain while leading an epic charge during the height of the Troll Wars. The body of the knight was never found but, because of his bravery, the tide of the war turned and Sir Tolwar became revered as a Saint. A brotherhood was formed that honored the knight, and they erected a shrine...   [click here for more]
Chaosium  $6.95

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Light Without Shadow, Blade Without Edge

Light Without Shadow, Blade Without Edge


A Fantasy Adventure For BRP Heroes An ancient curse kills an obscure order of monks. Aeons later, the last island of human existence struggles against new masters of the world. Blood from those long-dead monks is the key to human salvation - and the last vial belongs to a vampire. You must steal it. BASIC ROLEPLAYING MONOGRAPHS are longer works by one or more authors on a subject of import...   [click here for more]
Chaosium  $6.95

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Lords of Tarsa

Lords of Tarsa


The Mythic West The year is 1092 in the Age of Itania. King Girart of Mirensa, villified as the killer of children, schemes to bring the Nine Kingdoms under his crown while Safiro of Tivonna engages magi and spies to thwart Girart’s ambition. Mad King Bertrant of Ossirenza bears the burden to defend the lands of Men against marauding Krek even as his galleys war on Tivonnan ships to satisfy...   [click here for more]
Chaosium  $10.95

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Magic World

Magic World


Fantasy Roleplaying in Worlds of Epic Adventure Curumir wiped blood from a gash over his eye as he peered through the fog and gloom of the pine woods. Storm clouds were gathering, casting a deathly darkness over the boughs surrounding him. The sweet smell of sap filled his head. If he weren't fleeing for his life, the place would almost seem pleasant.   He'd been hounded for...   [click here for more]
Chaosium  $38.95 $24.42

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Mythic Iceland

Mythic Iceland


On the west of Norway comes the island called Iceland, with the mighty ocean washing round it: a land very squalid to dwell in, but noteworthy for marvels, both strange occurrences and objects that pass belief.The Danish History, by Saxo Grammaticus, 12th Century Legend and Adventure in Viking-Age Iceland The Nordic and Celtic peoples who settled Iceland in the 9th...   [click here for more]
Chaosium  $18.95

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Queensguard

Queensguard


A Steampunk Call of Cthulhu Campaign Welcome to Queensguard! Queensguard is a short campaign for the Call of Cthulhu roleplaying game. It is set in an alternate version of America in which steam technology and magic are woven into the fabric of society. Queensguard is divided into two acts, each of which should consume approximately two four-hour...   [click here for more]
Chaosium  $7.95

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The Green

The Green


Magical Adventures Beneath the Canopy Some say it began as a garden planted by the old gods when the world was young, so they might shade themselves from the fiery sun and take rest from their divine pursuits. Others maintain that a strong, healthy magic infuses the mountain waters that feed it, giving its flora and fauna their prodigious health and size. Still others have called it a verdant...   [click here for more]
Chaosium  $11.95

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The Magic Book

The Magic Book


Four Integrated Magic Systems for Basic Roleplaying Magic pervades many worlds of the Basic Roleplaying game system, for in the game every adventurer — every character — has the capacity to manipulate invisible powers. Though the beliefs of the user shape his or her approach to magic, all magic works by certain principles which stem from the life force of the user....   [click here for more]
Chaosium  $14.95 $8.22

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The River Terror, and others

The River Terror, and others


Here are the winning entries from the 2009 Chaosium BRP Adventure Contest. Explore mythic Australia, battle for lost New Caledonia, assist Boston police in a kidnapping, and make a strategic strike against the Nazi Occult Bureau in the 1930s! These and other adventures take place in different times and places, for Basic Roleplaying and the Basic Roleplaying Quickstart rules....   [click here for more]
Chaosium  $13.95

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The Stars Are Right!

The Stars Are Right!


The Taste of Ashes THE NEW MILLENNIUM: a time wracked by violence, racism, AIDS, drug abuse, and all-consuming fear. Hollow politicians offer empty promises of the bright future - a thousand points of light which none can see. That which is greater than mankind lurks beyond the rim of human consciousness. It patiently watches, waiting to assume command of our destiny. It preys on the fearful,...   [click here for more]
Chaosium  $23.95 $13.17

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Val-du-Loup

Val-du-Loup


Adventures in the Heart of the Ardennes Forests A small, backward region of the dense, primal Ardennes forests. The Church wields little influence among the counties and baronies along the river Loup. Christian fervor clashes with Frankish and Celtic traditions. Barons feud for land, while greedy princes - the Prince-Bishop of Liège and the Count of Luxembourg - grab the last tidbits left of...   [click here for more]
Chaosium  $13.95

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