E.B. · Erik Balslev · Erik Blakeley
Green Ronin Publishing · White Wolf Publishing
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Tome of Horrors *OP | 978-1-58846-112-4 | 2002 | Scott (with: Clark Peterson · Kevin Baase · Casey Christoff Greene |
| True 20 Adventure | 978-1-934547-14-4 | 2013 | Dave Jarvis · Matthew E. Kaiser |
| True20 Bestiary | 978-1-932442-68-7 | 2006 | |
| True 20 Companion: A Sourcebook For True 20 Adventure RPG | 978-1-932442-83-0 | 2013 | Michelle Lyons · Steve Kenson · Dave Jarvis · Matthew Kaiser · Sean Preston |