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The Official Chaosium Inc. Homepage
Publishers of the Call of Cthulhu roleplaying game line and the popular Cthulhu Cycle series of Mythos fiction and non-fiction books.
http://www.chaosium.com

Pagan Publishing
Licensed publisher of Call of Cthulhu game products such as Delta Green and The Unspeakable Oath. Their online catalog, The Outsider, carries many Lovecraftian products.
http://www.tccorp.com/pagan/