DRMWVR unlocks Cassandra's Gang to play as for multiplayer fun.
Enter this password to equip your tank with absolutely all weapons : RCKTSRDGLR
Enter the password WRDRB to gain access to a bonus level in campaign mode.
Enter the password :HPPYHPPPY and you become totally invincible.
Enter 8ODYS as your password to enable the level select menu.
Put in these passwords for mini sized tanks(One works for a team)
P.S. When you're small,you can't get shot by anything but a nuke.The grenades and nukes are tiny also.
Enter NNKNHCKS as your password and you'll be able to play as a special team called brandons gang.