| ▲Título▼ | ▲C▼ | ▲Año▽ | ▲V▼ | ▲Concepto▼ |
|---|---|---|---|---|
| Deities of the Mythos ("Malleus Monstrorum") (junto a Phil Anderson, Marion Anderson, Scott David Aniolowski et al.) |   | 2006 | — | Escritor |
| De Schip Zonder Schaduw (The Ship Without Shadows) |  | 1984 | — | Escritor |
| Act II - The Wanderer (junto a John Diaper, Bob Gallagher y Steve Rawling) | | 1983 | — | Escritor |
| Act I - Into the Throat of the Beast (junto a John Diaper, Bob Gallagher y Steve Rawling) | | 1983 | — | Escritor |
| Death in Dunwich | | 1983 | — | Escritor |
| Act III - And the Dogs Shall Know You (junto a John Diaper, Bob Gallagher y Steve Rawling) | | 1983 | — | Escritor |
