All Tanks:
Enter THRTN as a password.

All Weapons:
Enter SRTHMB as a password.

Invincibility:
Enter MSTSRVV as a password.

Level Select:
Enter BCKDR as a password.

Brandon Gang:
Enter SMSLGNG as a password.

Cassandra Gang:
Enter NSTYGRL as a password.

Custom 1 Gang:
Enter TRDDYBRRKS as a password.

Campaign Mode Bonus Level:
Enter WRDRB as a code to unlock the Boat Assault secret level after campaign mode is completed.