All starting locations in patrol mode
Press Down, Up, L2, L1, X, Triangle, R2, R1 at the title screen. A sound should confirm the code if entered properly.
Cheat mode
Press Left, Right, L1, R1, Circle, Square, R2, L2 at the title screen. A sound should confirm the code if entered properly. All weapons in free patrol mode and all bonus item menu options will now be unlocked.
Level select
Press Down, Up, Left, Right, X, Triangle, Circle, Square, at the title screen.A sound should confirm the code if entered properly.