In the Dungeons & Dragons role-playing game, Urdlen is the gnome deity of greed and blood.
In many campaign settings, the gnome pantheon of gods consists of the leader Garl Glittergold, as well as Baervan Wildwanderer, Baravar Cloakshadow, Flandal Steelskin, Gaerdal Ironhand, Nebelun, Segojan Earthcaller, and Urdlen.
Urdlen was first detailed in Roger E. Moore's article "The Gnomish Point of View," in Dragon #61 (TSR, 1982). In Dragon #92 (December 1984), Gary Gygax indicated this as one of the deities legal for the Greyhawk setting. He also appeared in the original Unearthed Arcana (1985).
Urdlen was detailed in the book Monster Mythology (1992), including details about his priesthood. His role in the cosmology of the Planescape campaign setting was described in On Hallowed Ground (1996). He received a very detailed description for his role in the Forgotten Realms in Demihuman Deities (1998).
Urdlen's role in the Forgotten Realms is revisited in Faiths and Pantheons (2002).