Discworld Rulebooks

A One in a Million Chance at Adventure (2nd Edition)

2019 Core Rules A One in a Million Chance at Adven… Fantasy Fantasy (Science Fantasy)

Discworld Roleplaying Game

2015 Campaign Setting Core Rules GURPS (4th Edition) Comedy / Satire Fantasy (High Fantasy)

GURPS Discworld Also

2000 Adventure Sourcebook GURPS Discworld Roleplaying Game Comedy / Satire Fantasy (High Fantasy)

GURPS Discworld Roleplaying Game

1997 Campaign Setting Core Rules GURPS Discworld Roleplaying Game Comedy / Satire Fantasy (High Fantasy)