The game, often abbreviated as CoC, is published by Chaosium.

The d20 version of the game is no longer supported by Wizards as per their contract with Chaosium.

Chaosium is one of the longer lived publishers of role-playing games still in existence.

Why Chaosium is.

RuneQuest is a fantasy role-playing game first published in 1978 by Chaosium, created by Steve Perrin and set in Greg Stafford's mythical world of Glorantha.

Superworld is a superhero-themed role-playing game published by Chaosium in 1983.

Superworld is based on the traditional Chaosium Basic Role-Playing system, here augmented by super-powers.

In the Call of Cthulhu roleplaying game published by Chaosium, the King In Yellow is an avatar of Hastur who uses his eponymous play to spread insanity among humans.

He is an illustrator for the publisher Chaosium including a cover for the novel The Spiraling Worm.

It should be noted the RPG company Chaosium is responsible for the vast misconception that the shoggoth in that story is one of the young of Shub-Niggurath.

Ross later stated in an interview that the image used is actually a corruption of his original drawing ; apparently, Chaosium printed the image both upside-down and backwards.

Perrin is probably best known for creating the role-playing game RuneQuest for Chaosium.

The Black Ocean Society is mentioned several times as a front for the worldwide Cthulhu cult in game supplements released by Chaosium and Pagan Publishing in support of their Call of Cthulhu and Delta Green role playing games.

Stafford is perhaps most famous as the creator of the fantasy world of Glorantha, but is also a prolific games designer-he was designer of Pendragon, he was co-designer of the RuneQuest, Ghostbusters, Prince Valiant and HeroQuest role-playing systems, founder of the role-playing game companies Chaosium and Issaries, designer of the White Bear and Red Moon, Nomad Gods, King Arthur ’ s Knights and Elric!

Arkham Horror is an adventure board game designed by Richard Launius, originally published in 1987 by Chaosium and most recently published in 2005 and revised in 2007 by Fantasy Flight Games.

The original conception of Call of Cthulhu was Dark Worlds, a game commissioned by the publisher Chaosium but never published.

Rather, the core system has been presented in a variety of formats that have been adapted by various publishers ( both Wizards of the Coast and third-party ) to specific settings and genres, much like the Basic Role-Playing system common to early games by veteran RPG publisher Chaosium.

Not able to find a publisher, Stafford founded a company of his own, Chaosium, in November 1975.

A percentile skill-based system, BRP was used as the basis for most of the games published by Chaosium, including Stormbringer, Worlds of Wonder, Call of Cthulhu, Superworld, Ringworld, Elfquest, Hawkmoon, Elric !, and Nephilim.

Call of Cthulhu uses the Basic Role-Playing system used by other Chaosium games ( first seen in RuneQuest ).

In 1987 Chaosium issued the supplement titled Cthulhu Now, a collection of rules, supplemental source materials and scenarios for playing Call of Cthulhu in the present day.

In April 2011, Chaosium and new developer Red Wasp Design announced a joint project to produce a mobile video game based on the Call of Cthulhu RPG entitled Call of Cthulhu: The Wasted Land.

* Call of Cthulhu Collectible Card Game-CCG based on the Cthulhu Mythos and the Chaosium pulp horror setting.

Green Knight Publishing formed to focus on Pendragon, Chaosium " proper " retained Call of Cthulhu, Stormbringer, and Mythos, while Greg Stafford founded Issaries, Inc. to publish HeroQuest and focus on bringing new Glorantha related material into print.

Chaosium, publishers of the Call of Cthulhu role-playing game, have a trademark on the phrase " The Call of Cthulhu " for use in game products.

“ In Rerum Supernatura ”, < cite > Call of Cthulhu </ cite >, 5th ed., Oakland, CA: Chaosium, pp. 189 – 92.

* Shoggoths appear in both the Chaosium and the Wizards of the Coast Call of Cthulhu role-playing game supplements.

In 1989, Kevin Ross designed a Yellow Sign symbol for the Chaosium roleplaying game Call of Cthulhu.

* Call of Cthulhu ( role-playing game ), published by Chaosium

Nephilim uses the Basic Role-Playing system used in many other Chaosium products, such as Call of Cthulhu, Pendragon and RuneQuest.

While at Chaosium he also created Stormbringer, Worlds of Wonder, Elfquest, and Superworld, and contributed to Thieves ' World and Call of Cthulhu.

TSR published this material under the assumption that it was in the public domain, but Arkham House, claiming to hold the copyright, had already licensed it to Chaosium for their Call of Cthulhu role-playing game series.

The term was popularized by Chaosium, the producers of the Lovecraftian role-playing game Call of Cthulhu.

Between 1990 and 1998, Chaosium released a number of Lovecraft Country gamebooks for the Call of Cthulhu roleplaying game, series created by author / editor Keith Herber.

Additional milieu were provided by Chaosium with the release of Dreamlands, a boxed supplement containing additional rules needed for playing within the Lovecraft Dreamlands, a large map and a scenario booklet, and Cthulhu By Gaslight, another boxed set which moved the action from the 1920s to the 1890s.

Mythos was a collectible card game ( CCG ) based on the Cthulhu Mythos that Chaosium produced and marketed during the mid-1990s.

In 1996, Chaosium published The Nyarlathotep Cycle, a Cthulhu Mythos anthology focusing on works referring to or inspired by the entity Nyarlathotep.

In 1995, Chaosium published The Azathoth Cycle, a Cthulhu Mythos anthology focusing on works referring to or inspired by the entity Azathoth.

In 2005, Chaosium published a Cthulhu Mythos anthology edited by Robert M. Price called The Tsathoggua Cycle, which comprised the original Clark Ashton Smith stories featuring Tsathoggua, along with tales by other authors in which the entity has a starring role.

Lovecraft, had already licensed the Cthulhu property to the game company Chaosium.

* In the 1980s a role-playing game based on this setting was produced by Chaosium named The Ringworld Roleplaying Game.

In 1985, Kerie Campbell-Robson created a role playing game based on the Hawkmoon series, published by Chaosium and using its Basic Role-Playing system.