This little fact surprised me.
Gen Con is currently Indianapolis Convention Center’s largest annual convention, bringing the city tens of millions of dollars in revenue. It was originally held in Lake Geneva, Wisconsin in the late 1960s and organized by none other than Gary Gygax, the father of modern role-playing games. Since then the event has morphed into a four-day event combining tabletop miniatures, board games, video games and live-action role-playing games. It regularly creates in excess of $50 million in revenue for the city of Indianapolis.