These can be unlocked at the mainframe in the police station. Just go to "Codes."
Effect Password Circus Clown yxjrtc Deep Sea Diver rmrqfn Forestman disguise kkrrwx Mime disguise tfwfvs Ninja Warrior cxpnxx Riot Vehicle nqbsrp Sentinel Disguise MRPHVQ Spartan Warrior disguise cqdhjs Unlock Drakonas VZHHDM Unlock Zombie hvgtpg
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You can submit new cheat codes for this game using our Cheat Submission Form.
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If you see a non-working or fake code in the list above, let us know by using our Problem Submission Form.