Fight against Geese:
Accumulate more than 380 fighting points. 

Krauser's Unlimited Desire move: 
Press X[3x], Circle[3x], Square[2x], Down, Down/Back, Back, Down, Down/Back, Back,
Square.

Billy Kane combo:
Close in to opponent, then press X, Circle (after 3 hits), Down, Down/Forward, Forward,
Square. This combo looks great and does about one-quarter damage.

View FMV Sequences:
Complete the game in single mode, then enter the Omake mode screen. 

Single Button Special Moves:
Complete the game in survival mode, then enter the Omake mode screen. This allows special
moves to be assigned to one of the shoulder buttons on the controller.