Various cheats

Enter the following codes at the Main Menu. 

Debug Information: 
     Left, L1, L1, Right, R1, R1, Up, Down

Flycam Option: 
     Up, L1, Down, R1, R2, Down, L2, Up

Level Select: 
     R2, Left, Right, R1, L1, Up, Down, L2

Invincibility: 
     L2, Square, L1, Circle, R2, Square, L1, Circle

Unlock Gallery FMV Sequences: 
     Circle, L2, Left, R1, R2, Right, L1

Infinite Musket Ammo: 
     Square, L1, R1, Up, Circle, L2, R2, Down

Unlock All Intermission Sequences: 
     Right, Circle, Square, Square, R1, R2, Left, L2