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Playstation - Clock Tower - Ghost Head cheats

View character biographies
Unlock all 13 endings, then choose the "Pamphlet" mode. Select the 
unlocked "Guide" option to view each character's biographies.

Unlock Extra mode option at the title screen:
Finish the game and reach "A" rank. You can select "Time Attack" and 
"Score Attack" mini-games in this option.

Unlock Sound test option in the Option mode:
Press Left, Circle, Down, Triangle, Right, Square, Up, X, L1, R2, L2, 
R1 + Start buttons at the title screen and start a game. 

Wear school uniform
Hold L1 + R2 + Select + Triangle buttons at the title screen and 
start a game.

Unlimited power spell charm :
Hold L1 + L2 + R1 + R2 buttons at the title screen and start a game.