| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Casablanca ni Ai o: Satsujinsha wa Jiku o Koete | Thinking Rabbit | 1986 | Japanese | |
| City of Madness | Wayne McWilliams | 1989 | English | |
| Crystals of Doom | Time Assassin | 1985 | English | Solution |
| Curses | Graham A. Nelson | 1993 | English | Solution |