Press Enter in Single Player mode and enter one of the following codes:
Infinite money: ineedalltechnos
$1,000: fortknox
Full map: keyholemaster
Spawn Russian T-80 tank: motherrussia
Spawn CIA Armored SUV: coolihaveanewcar
Spawn S.W.A.T. member: swatatyourorders
Spawn British cop: greenjelly
Spawn Duck: duckhunt
Spawn U.S. police office: rymca
Spawn British Ambulance: bringoutthedead
Camera mode: bigbrother