Nine Continues
     Pause  the game and press Down, Down, Down, X, Circle, X, Circle,
Triangle,  Square,  Triangle,  Square,  Up, Up, Up, Left, Right, Left,
Right, Left, Right.

Nine Planes
     Pause  the  game and press Up, Down, Left, Right, Square, Square,
Left, Right, Square, Circle, Up, Down.

Self-Destruct
     Pause  the  game and press Up, Up, Down, Down, Left, Right, Left,
Right, X, Circle.