| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| GURPS Prime Directive Core Rulebook | 978-1-58564-022-5 (1-58564-022-0) | 2002 | Steven P. Petrick · Leanna M. Cole |
| Gurps Prime Directive: Roleplaying in the Star Fleet Universe | 978-1-58564-047-8 (1-58564-047-6) | 2005 | Steve Cole |