Unlimited continues
Press [Y], [Down], [Up], [L], [R]x2, [L] at the title screen.
Level select
Press [Y], [Down], [Up], [R], [L]x2, [R] at the title screen.
Weapon select
Press [Y], [Down], [Up], [L], [R], [L], [R] at the title screen. Hold [A] + [C] and press [Y] during game play to switch to the next weapon.
View FMV sequences
Press [Y], [Down], [Up], [L], [R], [Down] at the title screen.
Sound test
Press [Y], [Down], [Up], [L], [R], [Up] at the title screen.
FX test mode
Press [Y], [Down], [L], [R], [Up] at the title screen.
Contra mini-game
Enter the small house at the end of stage two. Stand in front of the arcade machines to play the Contra mini-game.
Bonus mini-games
Press [Y], [Down], [Up], [L], [R], [Left] or [Y], [Down], [Up], [L], [R], [Right] at the title screen.