Jon F. Zeigler

GURPS Space Fourth Edition (GURPS: Generic Universal Role Playing System)

2006

GURPS Traveller Nobles

2004

GURPS Sid Meier's Alpha Centauri

2003

Transhuman Space Fifth Wave (Transhuman Space)

2002

GURPS Traveller Rim of Fire

2000

GURPS Greece

GURPS Greece

1995