G-Police
All Weapons + Unlimited Ammo:
At the Weapons Load Out screen, hold L1 + L2 +R1 + Circle + Triangle + Square and press LEFT.
Unlimited Ammo:
At the Weapon screen, hold L1 + L2 + R1 + R2 + Circle. If done correctly, you will hear a laser.
Invincibility:
At the Briefing screen hold L2 + L1 + R1 + Square + Triangle + Circle. While holding the buttons press LEFT.
At the Password screen enter:
ALLSECRET – All the Secret
PLINTH – Level Select
UTOPIA – All Bonuses
Password Level:
1 MADGAV
2 DOLMAN
3 SONAGAV
4 ACEDUF
5 JOJOGUN