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Playstation 2 - State Of Emergency cheats

While playing the game, enter the following button combination cheats.
If the cheat codes are accepted you will see a message.

AK47: Press Left, Right, Down, R2, Triangle.
Flame Thrower: Press Left, Right, Down, R1, Circle.
Grenade Launcher: Press Left, Right, Down, R1, Square.
Grenade: Press Left, Right, Down, R2, Square.
Increase looting: Press R1, L1, R2, L2, Triangle.
Invincibility: Press L1, L2, R1, R2, X.
Large size people: Press R1, R2, L1, L2, Triangle.
M16: Press Left, Right, Down, R2, Circle.
Minigun: Press Left, Right, Down, R1, Triangle.
Molotov Cocktail: Press Left, Right, Down, R2, X.
Normal size people: Press R1, R2, L1, L2, Circle. 
Pepper Spray: Press Left, Right, Down, L1, Square.
Pistol: Press Left, Right, Down, L1, Triangle.
Punches decapitate: Press L1, L2, R1, R2, Square.
Rocket Launcher: Press Left, Right, Down, R1, X.
Shotgun: Press Left, Right, Down, L2, Triangle.
Skip Mission: Press Left(4), Triangle. 
Small size people: Press R1, R2, L1, L2, X.
Tazer: Press Left, Right, Down, L1, Circle.
Tear Gas: Press Left, Right, Down, L1, X.
Unlimited ammo: Press L1, L2, R1, R2, Triangle.
Unlimited time: Press L1, L2, R1, R2, Circle.
Unlock Spanky in kaos mode: Press Right(4), Triangle
Unlock Bull in kaos mode: Press Right(4), X.
Unlock Freak in kaos mode: Press Right(4), Circle.

Destroy bombers:
Set them on fire with the flamethrower.

Unlock Chinatown stage
Reach 25,000 points in the Capitol City Mall stage in kaos mode

Unlock East Side stage
Reach 50,000 points in the Chinatown stage in kaos mode

Unlock Corporation Central stage
Reach 100,000 points in the East Side stage in kaos mode

Unlock Last Clone Standing stages
Finish the 3 minute and 5 minute versions of a stage in kaos mode

Easy escape:
Enable the "Tear Gas" code multiple times. The game will slow down 
slightly and enemies cannot find you, you can escape easily.

Unlock Infinite kaos mode time
Finish all kaos levels in arcade mode.

Unlock Bull in kaos mode
Finish the East Side level in revolution mode

Unlock Freak in kaos mode
Finish the Chinatown level in revolution mode

Unlock Spanky in kaos mode
Finish the Capitol City Mall level in revolution mode