More Powerful Weapons When you get 15 or more of some item, press A, B, and Z to fire a more powerful weopon of that kind. Level Select Enter "8ODYS" as a code. Invincibility Enter "HPPYHPPY" as a code. All Weapons Enter "RCKTSRDGLR" as a code. Brandon Gang Enter "NNKNHCKS" as a code. Campaign Mode Bonus Level Enter "WRDRB" as a code to unlock a secret level after campaign mode is completed. Unlock the M2 Hydra Tank in Multiplayer Mode Enter "TRDDYBRRKS" in the code field. Custom 1 Gang Enter "TRDDYBRRKS" as a password to unlock the Custom 1 gang in multi-player mode.