Mission Skip:
Quicky press R1, L1, R1, L1, R1, L1, Square repeatedly. A message will confirm correct code entry.

Show Hidden Drug Stashes:
Quickly press R1, L1, R1, L1, R1, L1, Left. A message will confirm correct code entry.

The Refinery:
Repeatedly press L1 + R1 + Circle + X. A message will confirm correct code entry.

All Weapons:
Quickly press R1, L1, R1, L1, R1, L1, then click the R3. A message will confirm correct code entry.

Infinite Ammo:
Enter the inventory screen. Quickly press R1, L1, R1, L1, R1, L1, Down while on a weapon. Only the weapon that was highlighted will have unlimited ammunition, and the code must be repeated for each weapon. A message will confirm correct code entry.

Unlock Bonus Mission:
Collect all 25 secret stashes in Asia.

Unlock Original 1988 Arcade NARC:
Collect all 25 secret stashes in USA.

Invisibility:
Quickly press R1, L1, R1, L1, R1, L1, X. A message will confirm correct code entry.

All Drugs and $10,000:
Enter the inventory screen. Quickly press R1, L1, R1, L1, R1, L1, then click the L3 while not on a weapon. A message will confirm correct code entry.