Blitz: The League - Unlock 2 Player Co-op
2 Player Co-op!At the Main Menu, select Extras, select Codes, and then press [X] to enter the password input screen. At the password input screen, enter the following passwords to unlock the corresponding cheats. If you entered the password correctly, the cheat will be unlocked in Quick Play mode, at the Game Options screen.
Two Player Co-op: CHUWAY