Urban Chaos: Riot Response Cheats

Cheat mode
Press [Up]x2, [Down]x2, [Circle], [Down], [Up], [Circle] at the main menu screen. A "Cheat" option will now appear at the title screen. Select that option, then enter one of the following case-sensitive codes to activate the corresponding cheat function, which can be toggled on or off (except for "All levels and emergencies"):

KEYTOTHECITY - All levels and emergencies
FRYINGTIME - Long range stungun
MINIFUN - Minigun instead of pistol
ULTIMATEPOWER - MK3 assault rifle with unlimited grenades
ZEROTOLERANCE - MK4 pistol
BURNINGBULLET - Bullets set fire to enemies
ISEEYOU - Thermal breather MK2 has better smoke visibility
WHATWASTHAT - Squeaky voices
KEEPYOURHEAD - No heads
DANCINGFEET - Disco mode
BURNERSREVENGE - Terror mode

Completion bonuses
Successfully complete the game to unlock the Terror difficulty setting and another level of medals.

Spin gun
Rotate the [Right Analog-stick] clockwise to make Nick spin the gun he is holding. Note: This only works with the pistol.