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. Custom 1 gang Enter "TRDDYBRRKS" as a code to unlock the Custom 1 gang (M2 Hydra tank) in multi-player mode. Campaign mode bonus level Enter "WRDRB" as a code to unlock a secret level after campaign mode is completed. Multiplayer Level Enter "WRDRB" as a code Stronger Weapons Press A+B at the same time to shoot a more powerful version of your weapon.