First beat the game and save. Then, start a new game from your savegame. After the start scene has finished, you'll see a control panel on the left wall where you can enter the codes.
| All weapons | 11692 |
| Max ammo | 61166 |
| Big heads | 10397 |
Unlock Art Gallery Option:
Enter the codes at the main menu:
Disc 1: Left, Right, Up, Down, Down, Circle.
Disc 2: Up, Up, R1, R1, R1.
Disc 3: L1, R2, L1, R2, L1, Square.
Disc 4: Circle, Circle, Square, L2, Square
