Publications (2) 
| Title | Code | Date | Publisher | System (Setting) |
|---|---|---|---|---|
 Keeper's Guide to the Secret War | MPS01032CS | 2013 | Modiphius Entertainment | Call of Cthulhu (Achtung!), Savage Worlds (Achtung!) |
 Keeper's Guide to the Secret War * | MUH51741 | 2019 | Modiphius Entertainment | Call of Cthulhu (Achtung!) |