Aliens have invaded and taken over the bodies of civilians and soldiers! You are assigned to the special Alien Brigade task force. Your mission is to kill the aliens, rescue any hostages, and save the Earth.

Each battlefield is several screens wide. As the screen scrolls left or right you must spot the alien targets and blast them while avoiding any civilian targets. Mutant soldiers and aliens will shoot back at you. Potential targets run back and forth or pop up right in front of you. Take careful aim with a light gun or use a joystick controller to steer your crosshairs.

There are five different levels. In the first you must rescue a group of hostages from a jungle military base. The second level takes you to a river resort where tourists are being terrorized. In the third level you must protect underwater government labs. The last two levels take you to the alien cave and mountain bases.

Your firepower will include a pistol, dart gun, machine gun, flame-thrower, and laser rifle. Along the way you will want to pick up grenades, rockets, and ammo clips. Food canisters may also be retrieved to heal your wounds. ~ Joseph Scoleri III, All Game Guide