At the Press Start Screen you can enter:

UP, DOWN, DOWN, RIGHT, RIGHT, RIGHT, LEFT, LEFT, LEFT, LEFT.

Then press and hold the Circle Button and press the Start Button. Now you can proceed to the Versus Mode and choose Characters. You will have every character to choose from.

At the Press Start Screen you can enter:

UP, DOWN, DOWN, RIGHT, RIGHT, RIGHT, LEFT, LEFT, LEFT, LEFT.

Then hold the Triangle Button and press the Start Button. You can now select Trial Mode. This will allow you to play every level. This mode will not count toward your game. But you can use it to practice.

At the Press Start Screen you can enter:

L1, R2, L2, R2, L2, TRIANGLE, CIRCLE, TRIANGLE, CIRCLE.

Now hold L1 and press Start.

You can select Sudden Death Mode from the Main Menu.

On the Press Start screen, push L1, R2, L2, R2, L2, then hold L1 and press Start. This will enable Max Power Mode and give you unlimited ammunition and every weapon in the game. Now get out there and spill some blood!

Don't forget that with Jean's submachinegun equipped, you can camera capture an enemy further away, switch to another weapon and maintain the "lock-on".