GURPS Witch World is a supplement published by Steve Jackson Games in 1989 for use with the GURPS {Generic Universal Role-Playing System) game rules that describes how to set a role-playing campaign in Andre Norton's Witch World.

The book is divided into eight chapters and an appendix, covering the history, geography, the creation of GURPS characters, and the system of color-based magic used in those lands.

It also gives a description of various magic items; psionic abilities; the use and properties of herbs, and a bestiary of Witch World creatures, most of which were mentioned in Andre Norton's books.

The colors correspond to the GURPS Magic spells as follows: The force of evil in this setting is known as the Shadow, and various unsavory creatures are allied with this aspect.

[2] In the June 1989 edition of Games International (Issue 6), James Wallis thought that the book had done a good job of interpreting the Witch World series, commenting, "authority and knowledgebility are apparent throughout."