| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Realms of Cthulhu | 978-0-9819874-4-6 (0-9819874-4-3) | 2009 | |
| RunePunk | 978-0-9763601-4-8 (0-9763601-4-4) | 2006 | |
| True 20 Companion: A Sourcebook For True 20 Adventure RPG | 978-1-932442-83-0 (1-932442-83-9) | 2013 | Michelle Lyons · Steve Kenson · Erica Balsley · Dave Jarvis · Matthew Kaiser |
Mr Sean Preston · S P · Sam Proctor · Seema Purushothaman · Shaun Prescott · Shaun Priest · Sonya Prestridge
Green Ronin Publishing · Pinnacle Entertainment · Studio 2 Publishing