Grey Ghost Press, Inc. · Steve Jackson Games
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Fudge, 10th Anniversary Edition | 978-1-887154-12-3 | 2005 | Steffan O'Sullivan |
| GURPS Bestiary 3ed | 978-1-55634-412-1 | 2000 | " |
| GURPS Bunnies & Burrows | 978-1-55634-237-0 | " | |
| GURPS Fantasy Bestiary reprint | 978-1-55634-184-7 | 1999 | " |
| GURPS Swashbucklers | 978-1-55634-394-0 | 1999 | " |
O's · O'Sullivan · S.O. · S. O'Sullivan · S S