Gurp's Horror: The Complete Guide to Horrific Roleplaying, by Haring, Scott D., Caparula, J. M.
Gurp's Supers: Super-Powered Roleplaying Meets the Real World, by Blanekenship, Lloyd
Gurp's Ultra-Tech: A Sourcebook of Weapons and Equipment for Future Ages, by Pulver, David L.
Gurps Cyberworld: High-Tech Low-Life in the One-And-Twenty, by Hume, Paul
GURPS HIGH TECH: A Sourcebook of Weapons and Equipment Through the Ages, by Steve Jackson games
Gurps Horror (Battles Against the Occult A Game World for the Generic Universal RolePlaying System), by Scott D. Haring
GURPS IOU (GURPS: Generic Universal Role Playing System), by McCoy, Elizabeth
Gurps Martial Arts: Exotic Combat Systems from All Cultures, by Jackson, Steve, Carella, C. J.
Gurps Space Atlas: A Compendium of World for Interstellar Roleplaying, by Steve; and Barton, William A. Jackson
Gurps Special Ops: Counterterrorism, Hostage Rescue, and Behind-The-Lines Action (GURPS: Generic Universal Role Playing System), by Rose, Greg
Gurps Swashbucklers: Roleplaying in the World of Pirates and Musketeers, by O'Sullivan, Steffan
Gurps Time Travel Adventures (Voyages Through History...and Beyond!), by Steve Jackson