He occasionally makes reference to D&D in his films, such as in xXx where one of the tattoos on Xander Cage (Diesel's character) reads "Melkor," the name of one of Diesel's old player characters. (Melkor was the original name for the fallen angel character of the Tolkien Legendarium.)
It has been said that his portrayal of Richard Riddick in the Pitch Black series of movies and games is based somewhat on this favorite character, a Drow "witch-hunter" who was a loner, and that Diesel has the character's image tattooed on his leg.
He has also written the foreword to the commemorative book 30 Years of Adventure: A Celebration of D&D, a collection of stories and essays which chronicles the history of D&D.
Diesel is also an avid fan of video games. He currently owns his own game studio, Tigon Studios, which produced The Chronicles of Riddick: Escape from Butcher Bay, a successful Xbox and PC game. His likeness and voice are featured in the game. At the 2006 Electronic Entertainment Expo in Los Angeles it was announced that he will lend his likeness to the Xbox 360 and PS3 game The Wheelman. The game is also being developed concurrently as a film, which Diesel will also star in.
