| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1983 | 978-0-920711-00-2 | N. Robin Crossby | Harn Regional Module (HarnWorld) [BOX SET] |
| 1985 | 978-0-920711-02-6 | Ron Gibson, Edwin King, N. Robin Crossby Dave Kowan | Encyclopedia Harnica 13: Orbaal (Harn Fantasy RPG Setting) |
| '' | 978-0-920711-06-4 | Edwin King | Encyclopedia Harnica 16: Zerhun (Harn Fantasy RPG Setting) |
| 1987 | 978-0-920711-18-7 | Melderyn: Kingdom Module (Harn) | |
| 1992 | 978-0-920711-36-1 | Castles of Orbaal: Arathel, Marby, Pled, Sherwyn (Harn) | |
| 978-0-920711-41-5 | Dixie - Bull Run Complete Set SW | ||
| 2000 | 978-0-920711-55-2 | N. Robin Crossby | Harnmaster Barbarians (Harn Fantasy Roleplaying System) |
| '' | 978-0-920711-59-0 | N. Robin Crossby · Edwyn Kumar | Trobridge Inn: Pepper & Spice (Harn Fantasy RPG Setting) |