Press Up, Up, Down, Down, Y, Down, Up, Y on your controller to unlock the cheat option. Got to cheat section and enter one of the following codes:Code – Effect:DANCINGFEET – Enable disco mode BURNERSREVENGE – Enable terror mode BURNINGBULLET – One hit kills KEEPYOURHEAD – Without heads ISEEYOU – Better visibilty in smoke WHATWASTHAT – Turns on squeaky voices FRYINGTIME – Long range stungun MINIFUN -? MinigunULTIMATEPOWER – MK3 assault rifle with infinite grenades ZEROTOLERANCE – MK4 pistol KEYTOTHECITY – All levels and emergencies Unlock Swap Pistol with Mini-gun:Accumulate 204 medalsUnlock weapons:Unlock Assault Rifle? 1 – Finish two Emergency Situations Unlock Assault Rifle? 2 – Finish four Emergency Situations Unlock Assault Rifle? 3 – Finish six Emergency Situations Unlock Shotgun? 1 – Finish one Emergency Situation Unlock Shotgun? 2 – Finish three Emergency Situations Unlock Shotgun? 3 – Finish five Emergency SituationsThermal Breather – Finish Webster Street.Terror Mode and other levels of medals – Finish game in story mode