An entire airport has been captured by a group of terrorists known as "The Unknown Guerillas." It's up to two enforcers to put an end to this and reclaim the airport. Their names are Rad Rex and Manic Jackson; they are the Freedom Force. As one of these enforcers, you'll play through round after round of shooting action, each round consisting of several airport scenes, the Unknown Guerilla Hideout and a special code breaker challenge stage.

With your Zapper (or other NES gun), it's your responsibility to shoot any guerillas (bagmen and elite assassins) that get in your way. You must also face Eugene Extreme, a cowardly, yet ambitious leader and mastermind of the whole operation. At the same time, however, be careful not to shoot passengers, kids, flight attendants and other innocents.

If you run out of ammo or are shot 12 times (without picking up extra health), you'll die. At the same time, shooting six innocents will take you back to Scene 1 of a round. As you progress through the rounds, you can shoot icons to give you more health, extra ammo, and one of three different weapons: a .38 caliber gun, a .44 magnum and a grenade launcher. Be careful, though, there's also one target designed to make the game harder.