Compatible emulators

Synopsis

The enemy spacecraft advances in formation from the top of the screen, dropping bombs as it goes. If you don't shoot them first, they may leave the formation to attack you. Left and right movement is controlled by the joystick and the fire button fires the missiles. There is nowhere to hide on the screen. You have to keep shooting and running until all your lives are lost. Aliens come in three varieties. Everyone's score is doubled if you can hit them once they leave the formation. Bonus points are awarded if a formation is completely destroyed. Another wave then appears. An additional ship is gained for every six convoys destroyed.

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