LAKE GENEVA — The role playing game Dungeons & Dragons and the tabletop gaming convention GenCon can both be traced back to Lake Geneva. Gygax organized the first GenCon in 1968 at Horticultural Hall in Lake Geneva several years before he created Dungeons & Dragons. The name itself is a reference to Lake Geneva, as it was formally known as the Geneva Convention in its early years. Watch: Lake Geneva honors D&D creator:Lake Geneva historian exhibits local legacy of Dungeons & Dragons creatorThe museum also features a map with a self-guided tour of the places in Lake Geneva where Gygax has history. TMJ4 A plaque dedicated to GenCon founder and Dungeons & Dragons creator Gary Gygax outside of Horticultural Hall in Lake Geneva.