| ▲Título▼≋ | ▲Original▼≋ | ▲Año▼≋ | Idioma | ▲C▽≋≋ | ▲V▼ |
|---|---|---|---|---|---|
| Achtung! Cthulhu: Guide to the Eastern Front Chapter 4: Heroes of the Soviet Union | 2014 | Inglés |   | — | |
| Acerca de los hechizos | Concerning Spells | 2021 | Español | | — |
| Acerca de la magia | Concerning Magic | 2021 | Español | | — |
| About Ithaqua | 1994 | Inglés | | — | |
| About Investigators ("Call of Cthulhu 5th Edition") | 1992 | Inglés | | — | |
| About Investigators | About Investigators ("Call of Cthulhu 5th Edition") | 1998 | Inglés | | — |
| 1890s Investigators: A Guide | 1991 | Inglés | | — |