Overflowing Toilet
When you get to the bathroom in Chapter 1, start flushing the toilet until it overflows. Stay in the bathroom and eventually you will die and go to heaven.

All toy monkeys and art gallery images
While playing, hold L1 + R1 and quickly press Triangle, Circle, Triangle, Circle, Square(3), X.

Completion Bonuses
Win the game to unlock the Hard difficulty setting and the Ruby Key.

Full Secondary Ammunition
When playing, hold L1 + R1 and quickly press Triangle(2), X(2).

All gun upgrades for all characters
When playing, hold L1 + R1 and quickly press Square, Triangle, Square, X, Square, Circle, Square(2).

Full Health
While playing, hold L1 + R1 and quickly press X(3), Triangle.

Monster house cheat list
In all the hints provided for monster house for PS, replace
L2 with L1 key. The hints do not work on PS2 with L1
key, For example for full health you need to hold
down L2 and R1 at the same time and quickly press X
three times and then press the Triangle.

The game guru.

Unlock all chapters enter during game play
Hold L1 and quickly press x triangle x triangle x