Chaosium

Chaosium is an American tabletop-games publisher established by Greg Stafford in 1975. The company began as a vehicle for publishing Stafford's fantasy board game White Bear and Red Moon, later renamed Dragon Pass, which was set in his fictional world of Glorantha. From that foundation, Chaosium became one of the formative publishers of the role-playing-game industry, combining literary licenses, original settings, simulation-oriented rules, and extensive supporting fiction and supplements. The company's early importance came from RuneQuest, created by Steve Perrin and first published by Chaosium in 1978. RuneQuest introduced a skill-based system and a detailed fantasy setting rather than relying primarily on character classes and levels. In 1980, Greg Stafford and Lynn Willis distilled the underlying mechanics into Basic Role-Playing, commonly known as BRP. The percentile-based framework became the mechanical foundation for several later Chaosium games and helped establish the company's recognizable D100 design tradition. Chaosium's best-known property is Call of Cthulhu, first published in 1981 and based on the horror fiction of H. P. Lovecraft and related Mythos traditions. The game adapted BRP to investigative horror, emphasizing research, psychological pressure, vulnerable characters, and scenarios in which understanding the threat does not necessarily make it possible to defeat it. Call of Cthulhu became a long-running international product line encompassing core rules, campaigns, sourcebooks, fiction, licensed supplements, and later digital adaptations by other companies. During the 1980s, Chaosium expanded through additional games and licensing arrangements. Avalon Hill manufactured and marketed a third edition of RuneQuest under a 1983 agreement, while Chaosium retained responsibility for development and presentation. The company also published or collaborated on games such as Hawkmoon and Ghostbusters, the latter notable for its early use of a dice-pool mechanic. Other major lines associated with Chaosium include Pendragon, inspired by Arthurian literature; 7th Sea, a swashbuckling fantasy setting; and games connected to Glorantha, including HeroQuest. The company experienced serious financial and organizational difficulties in the late 1990s and early 2000s. The commercial failure of the Mythos collectible card game contributed to Greg Stafford's departure as president in 1998. Chaosium's operations effectively divided among successor businesses, with Stafford taking Glorantha-related rights into Issaries, Inc., while Chaosium continued to concentrate on Call of Cthulhu. Long-serving figures including Charlie Krank and Lynn Willis maintained the core company during this period, although Willis later retired because of ill health. A major restructuring began in 2015 after problems and delays associated with the Call of Cthulhu Seventh Edition crowdfunding campaign. Stafford and Sandy Petersen returned to active involvement, and Moon Design Publications became part of the ownership and management structure. Rick Meints, Jeff Richard, Michael O'Brien, and Neil Robinson became the central management team. The reorganization closed Chaosium's Hayward, California office and warehouse and shifted the company to an Ann Arbor base with outsourced fulfillment. Core rewards from the Seventh Edition campaign began shipping in 2016, and the edition received substantial recognition at the 2017 ENnie Awards. Since that consolidation, Chaosium has broadened its catalog through restored ownership, acquisitions, licensing, and distribution agreements. Pendragon and Prince Valiant returned to the company in 2018, followed by the acquisition of 7th Sea in 2019 and rights connected with Rivers of London later that year. Chaosium also assumed distribution for selected games originally developed or crowdfunded by other publishers, and acquired the Cthulhu Britannica and World War Cthulhu lines in 2021. The business remains principally associated with role-playing games, settings, supplements, fiction, and related publications rather than electronic video games.

Chaosium was founded in 1975 by Greg Stafford to publish White Bear and Red Moon, a fantasy board game set in Glorantha. The company name combined Stafford's idea of a chaotic home with a reference to the nearby Oakland Coliseum. Its early catalog included board games and wargames, but the business found its lasting identity in role-playing games. In 1978, Chaosium published RuneQuest by Steve Perrin. Its percentile skill system and setting-focused design became central to the company's approach. Stafford and Lynn Willis subsequently created Basic Role-Playing, a compact generic rules framework derived from RuneQuest. Published in 1980, BRP supported many later games using D100 mechanics. Call of Cthulhu, launched in 1981, applied the system to investigative horror inspired by H. P. Lovecraft and became Chaosium's defining commercial and cultural property. The 1980s brought expansion and outside licensing. Avalon Hill manufactured and marketed a third edition of RuneQuest under an agreement that left Chaosium responsible for development, acquisitions, and layout. Chaosium also published Hawkmoon and collaborated with West End Games on Ghostbusters. The latter used an early dice-pool design that influenced subsequent role-playing systems. The company continued to develop literary and mythic properties, including Pendragon, based on Arthurian tradition, and later 7th Sea, a swashbuckling fantasy game set in a fictionalized seventeenth-century Europe. Chaosium also entered fiction publishing in 1993, initially issuing works connected with Glorantha and the Cthulhu Mythos. It published magazines supporting its games, including Wyrm's Footnotes, Different Worlds, and Starry Wisdom. These publications helped build communities around the company's settings and provided space for rules material, scenarios, commentary, and fiction. The company encountered financial strain in the 1990s. The Mythos collectible card game's poor financial performance contributed to Greg Stafford's resignation as president in 1998. Chaosium's business subsequently fragmented into successor companies. Stafford retained Glorantha-related rights through Issaries, Inc., while Chaosium continued primarily with Call of Cthulhu under Charlie Krank and Lynn Willis. Willis retired in 2008 because of ill health and died in 2013. The next major transition followed delays and fulfillment problems surrounding the Call of Cthulhu Seventh Edition crowdfunding campaign. In 2015, Stafford and Sandy Petersen returned to active participation, and Moon Design Publications joined the ownership structure. Rick Meints, Jeff Richard, Michael O'Brien, and Neil Robinson assumed management roles. Chaosium closed its long-standing Hayward, California office and warehouse, moved its base to Ann Arbor, Michigan, and adopted outsourced fulfillment. Core campaign rewards began shipping in 2016, and the edition won nine of ten ENnie Awards for which it was nominated at Gen Con 2017. Chaosium then rebuilt and broadened its portfolio. King Arthur Pendragon and Prince Valiant returned to company ownership in 2018. The company acquired 7th Sea in 2019 and obtained rights for a role-playing game based on Ben Aaronovitch's Rivers of London novels. It also took on distribution for English-language editions of Aquelarre and Würm, later adding Upwind. In 2021, it acquired Cthulhu Britannica and World War Cthulhu rights and became associated with the newly formed Chaosium Group partnership with Black Monk Games. Greg Stafford remained a board chair and creative consultant until his death in 2018. Chaosium's modern identity rests on Call of Cthulhu, RuneQuest and Glorantha, BRP-derived systems, literary licenses, and a broad catalog of supplements, fiction, and campaigns.

• 2021

  The Chaosium Group partnership is formed

  [1]Chaosiumen.wikipedia.org

  Moon Design announces a partnership with Poland's Black Monk Games and the creation of The Chaosium Group.

• 2018

  Pendragon and Prince Valiant return

  [1]Chaosiumen.wikipedia.org

  Chaosium regains ownership of the King Arthur Pendragon and Prince Valiant role-playing games.

• 2017

  Call of Cthulhu Seventh Edition receives ENnie recognition

  [1]Chaosiumen.wikipedia.org

  The edition wins nine of the ten ENnie categories for which it was nominated at Gen Con.

• 2015

  Moon Design joins the ownership and management structure

  [1]Chaosiumen.wikipedia.org

  Chaosium undergoes a financial and operational reorganization, with Moon Design principals becoming its management team.

• 1998

  Organizational split follows Mythos difficulties

  [1]Chaosiumen.wikipedia.org

  After the commercial failure of Mythos, Greg Stafford leaves the presidency and Glorantha-related operations separate from the core Chaosium business.

• 1983

  Avalon Hill RuneQuest agreement

  [1]Chaosiumen.wikipedia.org

  Avalon Hill takes on manufacturing and marketing for a third edition of RuneQuest while Chaosium handles development responsibilities.

• 1981

  Call of Cthulhu debuts

  [1]Chaosiumen.wikipedia.org

  Chaosium publishes its Lovecraft-inspired investigative-horror role-playing game.

• 1980

  Basic Role-Playing is introduced

  [1]Chaosiumen.wikipedia.org

  Greg Stafford and Lynn Willis simplify RuneQuest mechanics into the generic BRP rules system.

• 1978

  RuneQuest is published

  [1]Chaosiumen.wikipedia.org

  Steve Perrin's RuneQuest becomes Chaosium's foundational role-playing property.

• 1975

  Chaosium is founded

  [1]Chaosiumen.wikipedia.org

  Greg Stafford establishes Chaosium to publish White Bear and Red Moon, a board game set in Glorantha.

A specialist tabletop publisher centered on literary horror, mythic fantasy, historical fantasy, and detailed skill-based role-playing systems. Chaosium's identity is particularly associated with investigative horror, the BRP/D100 rules tradition, long-form setting development, and licensed or literary source material.

• Investigative horror tabletop role-playing game · 1981

  Call of Cthulhu

  Chaosium's signature role-playing game adapts the fiction of H. P. Lovecraft and the wider Cthulhu Mythos into investigative horror. Players typically portray investigators who research occult events, confront dangerous entities, and face physical or psychological consequences. The game is notable for its emphasis on atmosphere, mystery, vulnerability, and percentile-based BRP mechanics. Its product line includes multiple editions, scenarios, campaigns, sourcebooks, fiction, and setting-focused supplements.

• Mythic fantasy tabletop role-playing game · 1978

  RuneQuest

  RuneQuest is a skill-based fantasy role-playing game set primarily in Greg Stafford's Glorantha. Rather than centering on conventional class-and-level progression, it uses percentile skills, detailed combat, cults, runes, and a strongly developed mythic setting. The line was one of Chaosium's earliest major RPG successes and remains central to the company's connection with Glorantha.

• Generic tabletop role-playing system · 1980

  Basic Role-Playing

  Basic Role-Playing is the compact, generic rules framework derived from RuneQuest by Greg Stafford and Lynn Willis. Its percentile skill mechanics became the basis for numerous Chaosium games, especially Call of Cthulhu, and helped define the company's D100 design family. BRP supports adaptation across fantasy, horror, historical, and other genres.

• Arthurian tabletop role-playing game

  King Arthur Pendragon

  Pendragon is a role-playing game inspired by Arthurian literature, particularly the traditions associated with Le Morte d'Arthur. Its design emphasizes knightly identity, family lineage, personality traits, chivalric behavior, and campaign history across generations. The property returned to Chaosium ownership in 2018.

• Swashbuckling fantasy tabletop role-playing game

  7th Sea

  7th Sea is a swashbuckling-and-sorcery role-playing property set in a fictionalized version of seventeenth-century Europe. It combines maritime adventure, dueling, political intrigue, exploration, and fantasy. Chaosium acquired rights to the second-edition line and associated published material in 2019.

• Fantasy board game · 1975

  White Bear and Red Moon

  White Bear and Red Moon was Greg Stafford's fantasy board game and Chaosium's first major publishing project. Set in Glorantha, it was later renamed Dragon Pass and provided the original commercial foundation for the company's long-running relationship with the setting.

• 2015

  Call of Cthulhu Seventh Edition fulfillment problems

  The campaign for Call of Cthulhu Seventh Edition was associated with delays and problems delivering backer rewards. The issue prompted the return of earlier company principals and a broader financial and operational restructuring.

  Source

Read more

• 2015Call of Cthulhu Seventh Edition crowdfunding campaign

  International

  The crowdfunding campaign supported a new edition of Call of Cthulhu but encountered problems and delays in fulfillment. The difficulties contributed to a management and financial reorganization involving the return of Greg Stafford and Sandy Petersen and the integration of Moon Design's principals.

  Outcome. Core rewards began shipping in April 2016, and the edition received major ENnie recognition in 2017.

  Source

• 2021

  Acquire Cthulhu Britannica and World War Cthulhu rightsM&A

  Background

  Chaosium continued consolidating Cthulhu-related publishing rights.

  Action taken

  The company acquired rights to the two product lines previously published under license by Cubicle 7.

  Aftermath

  The acquisitions expanded Chaosium's direct control over Cthulhu-themed historical and regional settings.

  Source

• 2019

  Acquire the 7th Sea product lineM&A

  Background

  Chaosium was expanding through ownership of established role-playing properties.

  Action taken

  The company acquired rights to 7th Sea Second Edition, the Khitai material, and associated back stock from John Wick.

  Aftermath

  7th Sea became part of Chaosium's broader portfolio of fantasy and literary-adventure games.

  Source

• 2018

  Restore Pendragon and Prince Valiant ownershipM&A

  Background

  The company was rebuilding its portfolio after its mid-2010s reorganization.

  Action taken

  Chaosium brought King Arthur Pendragon and Prince Valiant back under company ownership.

  Aftermath

  The move strengthened Chaosium's position in literary and historical fantasy role-playing.

  Source

• 2015

  Reorganize ownership and operationsStrategy

  Background

  Financial and fulfillment difficulties followed the Call of Cthulhu Seventh Edition crowdfunding campaign.

  Action taken

  Moon Design's principals joined the ownership and management structure, the Hayward office and warehouse were closed, and fulfillment was outsourced from a new Ann Arbor base.

  Aftermath

  Chaosium resumed delivery of the campaign and expanded its catalog through later acquisitions, licenses, and distribution deals.

  Source

• 1983

  License RuneQuest manufacturing and marketing to Avalon HillStrategy

  Background

  Chaosium sought to expand RuneQuest's reach while retaining creative and development responsibilities.

  Action taken

  Avalon Hill manufactured and marketed a third edition, while Chaosium handled acquisitions, design, development, and layout.

  Aftermath

  The arrangement became a significant example of Chaosium using an external publishing partner for a major product line.

  Source

• 2021

  Chaosium acquires Cthulhu Britannica and World War Cthulhu rights[1]Chaosiumen.wikipedia.org

  M&A

  Chaosium acquired rights to the two Cthulhu-related lines previously published under license by Cubicle 7.

• 2020

  Chaosium expands distribution partnerships[1]Chaosiumen.wikipedia.org

  Other

  The company took over distribution of English editions of Aquelarre and Würm.

• 2019

  Chaosium acquires the 7th Sea line[1]Chaosiumen.wikipedia.org

  M&A

  Chaosium acquired rights to the 7th Sea product line and associated published stock.

• 2016

  Call of Cthulhu Seventh Edition rewards begin shipping[1]Chaosiumen.wikipedia.org

  Product generation

  Core rewards from the Seventh Edition crowdfunding campaign began delivery after the restructuring.

• 2015

  Chaosium reorganizes after crowdfunding delivery problems[1]Chaosiumen.wikipedia.org

  Leadership change

  Greg Stafford and Sandy Petersen returned to active roles following problems and delays in fulfilling the Call of Cthulhu Seventh Edition crowdfunding campaign.

• 1981

  Call of Cthulhu launches[1]Chaosiumen.wikipedia.org

  Product launch

  Chaosium introduced its influential investigative-horror role-playing game based on H. P. Lovecraft's fiction.

• 1978

  Chaosium publishes RuneQuest[1]Chaosiumen.wikipedia.org

  Product launch

  Chaosium released Steve Perrin's RuneQuest, establishing a major role-playing line set in Glorantha.

1. 1Chaosiumen.wikipedia.org