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Playstation - G-Police 2 - Weapons Of Justice cheats

Activate cheat mode
Enter the following cheat code as a password: "UTOPIA"
Now you can access to all 15 extra missions, movies, sound test 
and image gallery.

Unlimited ammo:
Star a new game, then hold L1 + L2 + R1 + R2 + Circle buttons 
at the weapons screen. Sound will confirm the correct code entry.

Select any stage:
Enter the following cheat code as a password: "PLINTH"
Now you can access to all 31 missions.