Beat level 7 on expert mode to get the alien disruptor.
When "Press Start" appears on the opening screen, hold Z and press Right, Left, Up, Down, A, B, Start.
Different Views In Chopper Select Screen
Go to a chopper but don't pick it yet. Hit the L button. There should be a screen with statistics and a rotating picture of your chopper. You can now use the analog stick to control the chopper's rotation.
At the "Press Start" screen, press C-Up seven times.
While playing, press Z + C-Up + C-Down, then launch a homing cluster at your opponent. If it hits, you will see the president jump out of the plane.
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Nintendo 64 Codes