Protector: RESURGENCE

Enter the "Options" menu. Highlight the "Save/Exit" option, then hold Pause + Option and press B to exit the screen.

Complete all waves. A special "Victory" screen, ship, and Expert mode will be unlocked. Another "Victory" screen appears at the end of Expert mode.

Hold Pause + 2 + 4 + 6 at the title screen. The sound of an explosion will confirm correct code entry. Repeat the process to disable its effect.