 In the 1960s, Gygax created an organization of wargaming clubs and founded the Gen Con gaming convention. In 1971, he helped develop Chainmail, a miniatures wargame based on medieval warfare. He co-founded the company Tactical Studies Rules (TSR, Inc.) with childhood friend Don Kaye in 1973. The following year, he and Arneson created D & D, which expanded on Gygax's Chainmail and included elements of the fantasy stories he loved as a child. In the same year, he founded The Dragon, a magazine based around the new game. In 1977, Gygax began work on a more comprehensive version of the game, called Advanced Dungeons & Dragons. Gygax designed numerous manuals for the game system, as well as several pre-packaged adventures called "modules" that gave a person running a D & D game (the "Dungeon Master") a rough script and ideas on how to run a particular gaming scenario. In 1983, he worked to license the D & D product line into the successful D & D cartoon series.
