All codes use the D-pad: U=up D=down R=right L=left
AK-47
L,R,D,R trigger, Y
M16
L,R,D,R trigger, B
Grenades
L,R,D,R trigger, X
Molotov cocktails
L,R,D,R trigger, A
Tazer
L,R,D, white, B
Pepper Spray
L,R,D, white, X
Pistol
L,R,D, white, Y
Flamethrower
L,R,D, black, B
Grenade Launcher
L,R,D, black, X
Mimigun
L,R,D, black, Y
Invincibility
white, L trigger, black, R trigger, A
Infinite Time
white, L trigger, black, R trigger, B
Decapitating Punches
white, L trigger, black, R trigger, X
Infinite Ammo
white, L trigger, black, R trigger, Y
Unlock Freak
R,R,R,B
Unlock Spanky
R,R,R,Y
Unlock Bull
R,R,R,A
Big Player
black, R trigger, white, L trigger, Y
black, R trigger, white, L trigger, A
Back to Normal
black, R trigger, white, L trigger, B
Rocket Launcher
While in the game press: L, R, D, Black, A. If you are playing in two player mode, the other player shouldn't move while the other player is doing the cheatcode.
