The player's six cities are being attacked by an endless hail of
ballistic missiles some of them even splitting like multiple
independently targetable reentry vehicles (MIRVs). New weapons are
introduced in later levels: smart bombs that can evade a less than
perfectly targeted missile and bomber planes and satellites that
fly across the screen and launch missiles of their own. As a
regional commander of three anti-missile batteries the player must
defend six cities in their zone from being destroyed.
The game is played by moving a crosshair across the sky background via a trackball and pressing one of three buttons to launch a counter-missile from the appropriate battery. Counter-missiles explode upon reaching the crosshair leaving a fireball that persists for several seconds and destroys any enemy missiles that enter it. There are three batteries each with ten missiles; a missile battery becomes useless when all its missiles are fired or if the battery is destroyed by enemy fire. The missiles of the central battery fly to their targets at much greater speed; only these missiles can effectively kill a smart bomb at a distance.
The game is played by moving a crosshair across the sky background via a trackball and pressing one of three buttons to launch a counter-missile from the appropriate battery. Counter-missiles explode upon reaching the crosshair leaving a fireball that persists for several seconds and destroys any enemy missiles that enter it. There are three batteries each with ten missiles; a missile battery becomes useless when all its missiles are fired or if the battery is destroyed by enemy fire. The missiles of the central battery fly to their targets at much greater speed; only these missiles can effectively kill a smart bomb at a distance.
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