Here are some cheats and tips for the game Twin Cobra.
Level select:
Press Up, Down, Right, Left, Start
after the helicopter lands at the title screen. The phrase “Stage
Select” will appear to confirm correct code entry.
Full weapon power:
Pause game play and press Up, Down, Right,
Left, A + Start. This will also bring any
weapons collected to full power. Note: This code must be re-enabled
with each new life.
Eight bombs:
Pause game play and press Up, Down, Right,
Left, B + Start. Note: This code must be
re-enabled with each new life.
View ending sequence:
Press Start to display the green opening screen and
press Up, Down, Right, Left, A,
B, C, Start.
Fourteen continues:
Press Start to display the green opening screen and
tap A to increase the continues. The maximum amount allowed
is 14.