Deathrow Available Cheats:

Extra Credits
Hold WHITE for 60 seconds on the "Manage Team" screen. The number of extra credits depends on the difficulty. To do this more than once, you will have to reboot the Xbox.

Unlock All Arenas
Name Player 4's controller as, "MOREROOM".

Unlock All Teams and Players
Name Player 4's controller as, "ALL150".

Unlock Everything
Enter the name "SouthEnd" and capitalise "S" and "E".

Unlock Extreme Difficulty
Name Player 4's controller as, "NO FEAR".

Unlock Multidisc
Name Player 4's controller as, "CONFUSED"