Shadow Gunner Cheats (PlayStation)

At the main menu, hold Select and quickly press Triangle, Triangle, Triangle. Then press
the following codes:

Triangle, Circle, Circle, Triangle, Circle, Square, X, X.

X, Circle, Triangle, X, X, Circle, X, Square.

Square, Triangle, X, Square, Triangle, Circle, X, Triangle.

Triangle, Triangle, X, X, Square, Circle, Square, X.

Square, X, Square, Triangle, X, Triangle, Circle, Square.