The Castle:
Win the Backyard Bowl to unlock the The Castle.
Jason Taylor:
Get five sacks in a game with one player to unlock Jason Taylor.
Larry Johnson:
Get five rushing TDs in a game with one player to unlock Larry Johnson.
Vince Young:
Throw five TD passes in a game with one player 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.