The Associated Press is reporting the death of Gary Gygax, the co-creator of Dungeons & Dragons, who has passed away at the age of 69 for unspecified reasons. The article reports that he had been suffering from health problems for several years.

Gygax’s 1974 creation became extremely popular with teenagers, later being made into comics, books, video games and even live action movies, as well as influencing popular culture to a great degree. He is now survived by his wife and six children.

May he rest in peace.