- 2nd Edition Mage to GURPS
- Convert Mage (second edition) to GURPS.
- All for one! Swashbuckling sourcebooks for fantasy role-playing
- Two swashbuckling sourcebooks, GURPS Swashbucklers and Avalanche Press’s All for One and One for All, bring the world of swashbuckling into roleplaying.
- GURPS World War II: A World Ablaze
- Gene Seabolt and Steve Jackson Games provides a fascinating and very useful gaming primer for role-playing characters in World War II.
- GURPS: Timeline
- This guide through pivotal moments in history, from author Chris W. McCubbin and publisher Steve Jackson Games is a great idea source for any game involving time travel.
