Invincibility:
Hold Select and quickly press Triangle(3) at the main menu. Then, press
Triangle, Circle(2), Triangle, Circle, Square, X(2).
Level select:
Hold Select and quickly press Triangle(3) at the main menu. Then, press Square,
X, Square, Triangle, X, Triangle, Circle, Square. Begin a new game, then hold
Select and press Left or Right at the mission introduction screen to choose a
new starting level.
Super gun:
Hold Select and quickly press Triangle(3) at the main menu. Then, press X,
Circle, Triangle, X(2), Circle, X, Square.
Invisibility:
Hold Select and quickly press Triangle(3) at the main menu. Then, press Square,
Triangle, X, Square, Triangle, Circle, X, Triangle.
Overhead view:
Hold Select and quickly press Triangle(3) at the main menu. Then, press
Triangle(2), X(2), Square, Circle, Square, X.
