All weapons
Enter "RCKTSRDGLR" as a code.
Brandon gang
Enter "NNKNHCKS" as a code.
Custom Gang in Multiplayer
To access the M2 Hydra tank in multiplayer, enter the passcode TRDDYBRRKS.
Invincibility
Enter "HPPYHPPY" as a code.
Invincible
Put in the code MSTSRVV
Passwords
To play on a particular level, highlight "Input Code" at the Options screen and enter its corresponding password.
Level 01: Ground Zero - FRHBMCTNTK
Level 02: The Tunnel - LHTSPMFRGS
Level 03: Times Square - NGLFFPTTFP
Level 04: Stranglehold Bridge - SHPPNRVWGB
Level 05: Bonus Level - MRFFCRTKP
Level 06: Heartland - LPGCVBBJCF
Level 07: Lake Shore Drive - GLWHJCRNLK
Level 08: State Street - KMKJTMHRNS
Level 09: Bonus Level - FLWWFCWNRK
Level 10: Armageddon Highway - WSMBCPVRWS
Level 11: Area 51 - CGJWVRGLNM
Level 12: Fremont Street - KVVLHFHWTB
Level 13: Bonus Level - FCLPJRWTMP
Level 14: Crimson Gate - TMFNJMKJGF
Level 15: Warf - PPJLJHRCVV
Level 16: Bonus Level - LNKNSWKGTH
Level 17: Q-Zone - WMNRSMRTR
Secret Multiplayer Level
Put in the code WRDRB
Select level
Put in the code 8ODYS
Super Weapons
If you press A+B at the same time, you will shoot a super version of the weapon selected. This works with every weapon but health or The Edge.