Platform:Gamecube
Unlock all levels and movies - hold L + R, press DOWN, LEFT, DOWN, Y, DOWN.
Infinite ammunition - hold L + R, press UP, LEFT, DOWN, RIGHT, X.
Infinite shotgun - hold L + R, press RIGHT, X, X, X, B.
Always double handguns - hold L + R, press Y, X, UP, UP, UP.
Unlocks all disarm motions - hold L + R, press B, B, X, X, RIGHT.
One hit death - hold L + R, press DOWN, X, LEFT, LEFT, LEFT.
Sniper scope cheat - hold L + R, press B, B, B, DOWN, RIGHT.
Bang Bang cheat - hold L + R, press X, Y, B, X, RIGHT.
Stormtrooper Syndrome - hold L + R, press B, LEFT, Y, UP, DOWN.
No cursor - hold L + R, press UP, UP, DOWN, DOWN, UP.
Unlock Hard Boiled difficulty - hold L + R, press Y, B, LEFT, LEFT, X.
Unlock Super Cop difficulty - hold L + R, press B, Y, LEFT, UP, RIGHT. Unlimited Stamina (Shadow) - hold L + R, press X, B, Y, X, DOWN. Infinite adrenaline - hold L + R, press LEFT, RIGHT, LEFT, X, B.
Unlimited armour - hold L + R, press UP, UP, UP, B, DOWN.
Dual Guncons - hold L + R, press Y, X, UP, UP, UP.
Infinite health (human shields) - hold L + R, press B, Y, X, Y, B.
Stronger melee - hold L + R, press Y, X, X, X, LEFT.
Double melee damage - hold L + R, press X, X, UP, UP, B.
All enemies unarmed - hold L + R, press RIGHT, B, LEFT, X, Y.
Invisible Jack - hold L + R, press Y, Y, UP, UP, Y. Note that enemies can still see Jack, but you can't him (except the ball shadow).