Level select
At the main menu, press R2, Left, Right, R1, L1, Up, Down, L2.

Invincibility
At the main menu, press L2, Square, L1, Circle, R2, Square, L1, Circle.

Infinite musket ammunition
At the main menu, press Square, L1, R1, Up, Circle, L2, R2, Down.

Flycam option
At the main menu, press Up, L1, Down, R1, R2, Down, L2, Up.

Gallery FMV sequences
At the main menu, press Circle, L2, Left, R1, R2, Right, L1.

View all intermission sequences
At the main menu, press Right, Circle, Square(2), R1, R2, Left, L2.

Debug information
At the main menu, press Left, L1(2), Right, R1(2), Up, Down.