| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| GURPS Blue Planet | Paperback | 978-1-55634-588-3 | 2003 | Jon F. Zeigler |
| GURPS Fantasy 4E Softcover *OP | " | 978-1-55634-796-2 | 2009 | |
| Gurps Fantasy | Hardcover | 978-1-55634-519-7 | 2004 | |
| GURPS Low-Tech | " | 978-1-55634-802-0 | 2010 | Peter Dell'Orto · Dan Howard · Matt Riggsby · Abrar Ajmal |
| GURPS Low-Tech | Paperback | 978-1-55634-343-8 | 2002 | Evan Jamieson · Richard Meyer · Eric Hotz |
| GURPS Supers *OP | " | 978-1-55634-771-9 | 2008 | Steve Jackson Games |
H.S. · W H · W.S. · William H. · William S. · William Stoddard