While playing, press SHIFT + ~ to bring down the console, then type:

Code	Result
iamleet	Complete all objectives, Win current mission
johnwoo	Slows down enture game process
swatlord	God mode for entire team
biggerpockets	Unlimited ammo
casual	Team missing pants and shirts
doubleshot	Fire weapon faster
nc17	Bodies bleed more when injured
noshades	Night missions play as if during the day
whosyourboss	Unknown effect
hotstuff	Suspects are harder to kill
justin	Suspects never surrender
rabies	Killer rats (when shot)