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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 Custom Systems 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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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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Chronicle of the Awakenings

Chronicle of the Awakenings


This book contains several new resources for the player and gamemaster of Nephilim. At the front of the book are sixteen new Past Life eras for character generation. These eras also help fill in some of the timeline of Nephilim history. Following the new Past Life eras is a section of new Metamorphosis rules which change the way in which the Transformations work, and introduce the idea of passionate...   [click here for more]
Chaosium  $16.95 $9.32

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Liber Ka

Liber Ka


Liber Ka is a supplement for Nephilim introducing an updated, alternative magic system following authentic occult principles. The book includes: The Nephilim history of western sorcery. A grimoire of new spells. Information on the Magician Arcanum. Background on using sorcery in the modern world. An extensive bibliography on modern occult practices. ...   [click here for more]
Chaosium  $14.95 $8.22

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Major Arcana

Major Arcana


Major Arcana are the Mysteries of the Tarot, the Paths to Agartha, and the Tribes of the Nephilim. This sourcebook includes the secret history, symbolism, alliances, and initiatory rituals of the 22 Nephilim Arcana. Major Arcana Features: Rules for astral travel, divination, meditation, magical correspondence, and other arcane techniques Over 30 new...   [click here for more]
Chaosium  $21.95 $12.07

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Nephilim Character Dossiers

Nephilim Character Dossiers


A package of spectacular 4-page character sheets designed to hold all the important game information for favored characters, printed on high-quality paper and profusely illustrated with images and symbols of past eras. Also includes a complete character generation summary. ...   [click here for more]
Chaosium  $8.95 $4.92

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Nephilim Gamemaster's Companion

Nephilim Gamemaster's Companion


Indespensible Resources for the Nephilim Gamemaster The secret history of the Nephilim, composing a timeline from the beginning of the universe to the end of the world as we know it. Rules for artifacts and sentient relics of amazing power. A bestiary of new elemental creatures. Gamemaster's advice on starting and running a Nephilim campaign. Advice on plotting...   [click here for more]
Chaosium  $14.95 $8.22

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Nephilim Gamemaster's Veil

Nephilim Gamemaster's Veil


Including the Astrological Modifier Wheel, Weapons Summary, and the adventure "Temple of the Ancients." The Nephilim Gamemaster's Veil provides the gamemaster and players with tools that help make playing Nephilim easier. The Gamemaster Screen collects the important information used during play in a convenient format, complete with page references. The...   [click here for more]
Chaosium  $14.95 $5.00

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Nexus

Nexus


SECRET AGENTS from all over the world are converging, clandestinely, on a small science fiction convention. Coded transmissions have been intercepted, emanating from somewhere near the Con Suite. Fans have mysteriously disappeared, and stangers have shown up at the convention wearing their badges. And the rumor has it that some of these clever costumes aren't really costumes at all. Live Action Roleplaying...   [click here for more]
Chaosium  $19.95 $8.00

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Serpent Moon

Serpent Moon


Serpent Moon consists of four loosely-related adventures. The first and last adventures are a matched set, with the first, “Intimations,” serving to notify the player Nephilim that the Templars intend some grand act of destruction, the nature of which remains unclear until later. The final adventure, “Culminations,” is the companion piece to “Intimations.”...   [click here for more]
Chaosium  $19.95 $10.97

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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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