Descpription:
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. 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 staged as a series of levels of increasing difficulty; each level contains
a set number of incoming enemy weapons. The weapons attack the six cities, as well as
the missile batteries; being struck by an enemy weapon results in destruction of the city
or missile battery. Enemy weapons are only able to destroy 3 cities during one level.
A level ends if all the cities are destroyed, or when all enemy weaponry is
destroyed or reaches its target. A player who runs out of missiles no longer
has control over the remainder of the level. At the conclusion of a level, the
player receives bonus points for any remaining cities or unused missiles.
Between levels missile batteries are rebuilt and replenished; destroyed cities
are not rebuilt, but at set point levels (usually 10 or 12K) a bonus city is awarded.
The game inevitably ends when all six cities have been wiped out. Like most
early arcade games, there is no way to "win" the game; the game just
keeps going with ever faster and more prolific incoming missiles.
