Super Contra
Cheat mode:
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Highlight "Arcade Game" and press A. The next screen will have two
options "Begin Game" or "Exit". At this screen, press Up(2),
Down(2), Left, Right, Left, Right, B, A, B, A. The game will begin
when you press the last A. Your lives will display as "4", but you
will have 30, and your gun will always be the missiles in rapid fire
mode.
Note: You cannot earn achievements or rank in the leaderboards when
this code is enabled.