Extra Life
During gameplay enter: Square, Triangle, Circle, Square, Circle, Button X, Square, Triangle,
Circle, Triangle, Triangle, Button X.
Invincibility
During gameplay enter: Square, Triangle, Circle, Square, Square, Triangle, Circle, Circle,
Square, Triangle, Square, Button X.
Keys
During gameplay enter: Square, Button X, Circle, Triangle, Button X, Triangle, Triangle, Button
X, Triangle, Button X, Triangle, Button X.
Level Select
During gameplay enter: Press Triangle, Square, Square, Triangle, Circle, Circle, Square, Square,
Triangle, Circle, Square, Square. Start a new game and you'll have access to all levels.
Psycho Robots
During gameplay enter: Square, Button X, Square, Button X, Circle, Square, Circle, Square,
Triangle, Circle, Circle, Square.
Shields
During gameplay enter: Triangle, Triangle, Button X, Square, Triangle, Circle, Triangle, Button
X, Square, Button X, Triangle, Button X
Turbo Mode
During gameplay enter: Square, Triangle, Circle, Square, Circle, Button X, Square, Button X,
Circle, Triangle, Square, Button X.
