MILWAUKEE (AP) — Gary Gygax, who co-created the fantasy game Dungeons & Dragons and is widely seen as the father of the role-playing games, died Tuesday morning at his home in Lake Geneva. He was 69.

He had been suffering from health problems for several years, including an abdominal aneurysm, said his wife, Gail Gygax.

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, particularly among teenage boys, and eventually was turned into video games, books and movies.