Note: This code requires operator's access. Highlight "Screen Adjustment" at the "System Operator" menu and hold Start for several seconds until you hear the "coin inserted" sound. Then press D, Right, B and the sound will be heard again. Press Start, Left, Start, Up, Right, A and the sound will be heard again. Finally, press Left, Down, Right, A, Start. The "Here comes a new challenger" sound will confirm correct code entry. Answer "Yes" at the "Special Contents Save OK?" prompt, then exit the menu.
Score attack mode
Hold A + B + C + D and press Start at the title screen.