An anonymous reader writes: According to game historian Jon Peterson, Gary Gygax's Chainmail fantasy wargame (which became the basis for Dave Arneson's Blackmoor and later Dungeons & Dragons) borrowed heavily from an earlier set of rules published by Leonard Patt, a long-forgotten member of the New England Wargamers Association. Among the appropriations were rules for heroes and wizards including the iconic fireball spell, which ended up in everything from Magic: the Gathering to World of Warcraft, as well as monster rules for dragons, orcs, ents, and other Tolkien creations. Gygax had something of a reputation for borrowing things without giving proper credit, and this latest revelation shows how the open and collaborative environment of early gaming was quickly exploited for commercial purposes.
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