Articles (2)
| Title | Pages | Publication | Code | Date | Publisher | System (Setting) | |
|---|---|---|---|---|---|---|---|
 The Crystal of Chaos | M1-M7 |  Different Worlds | 34 | May 1984 | Chaosium | Call of Cthulhu (Classic) | Providence; 1920s |
| The Crystal of Chaos | 43-63 |  The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | Providence |