Resurrect:
While playing the game, push Up, Down, Black, White. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Level select:
Finish the game. Your cleared save game file will now be marked "All levels unlocked". Load it to choose any level to be played.
User Cheat by boomer8

Submachine gun, miscellaneous items:
While playing the game, push Y, A, X, B, Y, Up. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Sniper, miscellaneous items:
While playing the game, push Y, A, X, B, Y, Right. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Rocket launcher, miscellaneous items:
While playing the game, push Y, A, X, B, Y, Left. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Heavy machine gun, miscellaneous items:
While playing the game, push Y, A, X, B, Y, Down. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Shotgun, miscellaneous items:
While playing the game, push Y, A, X, B(2), Up. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Nail gun:
While playing the game, push Y, A, X, B, A, Left. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Unlimited ammunition:
While playing the game, push Y, A, X, B, A, Right. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Cycle through spawn points:
While playing the game, push Y, A, X, B, A, Up. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Maximum charisma:
While playing the game, push Y, A, X, B, A, Down. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Invisibility:
While playing the game, push Y, A, X, B(2), Left. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Slow motion:
While playing the game, push Y, A, X, B(2), Right. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Fast motion:
While playing the game, push Y, A, X, B(2), Down. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Flymo ragdolls:
While playing the game, push Y, A, X, B, X, Up. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Invincibility (PAL version):
While playing the game, push Y, A, X, B, X, Right. You will see a message become visible at the top of the screen if you have entered the code correctly. Simply re-enter the code to disable the effect.

Bonus level:
Finish the game under the Rebel or higher difficulty setting to unlock the Liberty Island level.