Cheats: Select the Cheats option at the "extras" menu, then enter one of the following codes. Then press start and that cheat option will now appear on the cheats.
all levels- L2, R2, L2, R2, L1, R1
Art gallery- CIRCLE, X, L2, R2, CIRCLE, X
Movie Gallery- L1(2), CIRCLE, X, L1, R1
Unlimited ammo- R2, L2, CIRCLE, L2, X, R2
Unlockables: Complete this game with the following ranking, then go to "extra" menu and turn these cheats ON.
Battering Ram- Complete game with Professional ranking
Bulletproof- Complete game with Professional ranking
Fully Loaded- Complete game with Psychopath ranking
Time Out- Complete game with Career Criminal ranking