Dungeons & Dragons creator Gary Gygax, March 4 Gary Gygax, who co-created the fantasy game Dungeons & Dragons and helped start the role-playing phenomenon, died Tuesday, March 4, 2008, at his home in Lake Geneva, Wis. He was 69. Gygax and Dave Arneson developed Dungeons & Dragons in 1974 using medieval characters and mythical creatures. The game known for its oddly shaped dice became a hit and eventually was turned into video games, books and movies. Dungeons & Dragons players create fictional characters and carry out their adventures with the help of complicated rules. The quintessential geek pastime, it spawned a wealth of copycat games and later inspired a whole genre of computer games that's still growing in popularity.