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Nintendo Wii - Backyard Football cheats

Unlock Humongo Dome and the Castle:
You have to win the Backyard Bowl to unlock Humongo Dome and the Castle.

Unlock Jason Taylor:
To unlock Jason Taylor, you have to get 5 sacks in a game with one player.

Unlock Larry Johnson:
You have to get 5 rushing touchdowns in one game by one player to unlock 
Larry Johnson.

Unlock Vince Young:
You have to get 5 touchdown passes in a game to unlock Vince Young.

No catches:
While on defense, if the offense throws a far ball, become the defender 
that is guarding the receiver. Push or run into the receiver and it will 
result in an incomplete pass.