plastic kit model of a medieval castle. Arneson informed the players that instead of controlling regiments, they would each take one individual character into the castle of the Barony of Blackmoor to explore its dangerous dungeons. Arneson drew from numerous sources but quickly incorporated the fantasy supplement of Chainmail into his games. After about a year and half of play, Arneson (Blackmoor) and fellow gamer David Megarry (Dungeon! boardgame) traveled to Lake Geneva in November or December 1972 to pitch their respective games to Gygax, who at that time was a representative of the Guidon Games company. Gygax was immediately intrigued by the concept of individual characters exploring a dungeon setting.Gygax: "Dave was running a man-to-man (1 figure = one person) Chainmail fantasy campaign around then, and he... came down from the Twin Cities to see us, the gaming group, in Lake Geneva in the late autumn of 1972. Arneson brought some of his campaign material with him..." He and Arneson agreed to co-develop a set of rules, and Gygax quickly developed a castle and dungeon of his own, "Castle Greyhawk", set within his portion of the Great Kingdom map. Castle Greyhawk is sometimes considered the first dungeon in Dungeons & Dragons, and pioneered the roots of the mega-dungeon format of gaming. Two of his children, Ernie and Elise, were the first players, and during their first session, as Tenser and Ahlissa, they fought and destroyed the first monsters of the Greyhawk dungeon; Gygax recalled them as being either giant centipedes or a nest of scorpions. During the same session, Ernie and Elise also found the first treasure, a chest of 3,000 copper coins which was too heavy to carry, much to the children's chagrin.Gygax: "Later in the long session of exploration, the two intrepid adventurers came upon the lair of several kobolds, slew two and the rest fled. They found an iron chest filled with coins...several thousand copper pieces--that was too heavy to move. A big disappointment." After his children had gone to bed, Gygax immediately began working on a second level for the dungeon. At the next play session, Ernie and Elise were joined by Gygax's friends: Don Kaye, Rob Kuntz, and Terry Kuntz. About a month after his first session, Gygax created the nearby city of Greyhawk, where the players' characters could sell their treasure and find a place to rest. Home campaign (1972–1979) As Gygax and