At the title screen, press Left, Circle, Down, Triangle, Right, Square, Up, X, L1, R2, L2, R1 + Start. Then a "Sound Test" option will appear under "Option Mode".
At the title screen, hold L1 + R2 + Select + Triangle and start a game.
At the title screen, hold L1 + L2 + R1 + R2 and start a game. Then a power spell charm with unlimited uses will be available as soon as the game begins.
Unlock all thirteen endings, then select "Pamphlet" mode. A new "Guide" option will allow data for each character to be displayed.
Achieve an "A" ending rank to unlock an "Extra Mode" option on the title screen. This new mode contains selections for "Time Attack" and "Score Attack" mini-games.
If you were looking for Clock Tower: Ghost Head for PSX cheats, then you might also want cheats for: