GURPS Discworld (Steve Jackson Games, 1998) and GURPS Discworld Also (Steve Jackson Games, 2001) are role-playing source books which were written by Terry Pratchett and Phil Masters, which offer insights into the workings of the Discworld.
GURPS Discworld (Steve Jackson Games, 1998) și GURPS Discworld Also (Steve Jackson Games, 2001) reprezintă cărțile care au stat la baza jocurilor RPG, fiind scrise de Terry Pratchett și Phil Masters, ele oferind și o serie de detalii legate de operele Lumii Disc.