G-Police: Weapons of Justice

Unlimited Ammunition
To have unlimited ammo, begin a new game. Then press L1 + L2 + R1 + R2 + Circle at the Weapons screen. (A tone confirms correct entry.)

Unlock All Levels
Enter the Password: PLINTH and all 31 levels will open.

Unlock Database
In the password section enter: UTOPIA. I twill open all the secrets including 15 bonus missions, all the FMV, music and art.