Radar Scope © 1979 Nintendo.
As captain of the Sonic Spaceport, players must defend their station against enemy spaceships called Gamma Raiders, which attack with vengeance and swiftly retreat to formation. The object of the game is to destroy 48 enemy Gamma Raiders before there is total disintegration of all the Spaceports on the player's side.
Players can counterattack with the Rapid-Fire Laser Blaster which zooms the lasers over the three-dimensional-esque field of curving vectors, while it intercepts enemies. The lower on the radar screen that you destroy a Gamma Raider, the more points will be earned. If exploding decoys damage the Sonic Spaceport, the Laser Blaster's firing speed will reduce. The Laser Blaster's "Damage Meter" will light up as damage is incurred and when fully illuminated, will weaken the Laser Blaster's offensive powers. To reverse this, the players must attack and destroy all remaining Gamma Raiders.
Players are given a wide range of flexibility in controlling the difficulty levels of the game. Extra Spaceports are awarded at 7,000, 10,000, 15,000 and 20,000 points, as determined by the players. The initial number of Spaceports may also be pre-programmed at 3, 4, 5 or 6. When the required number of spaceships is destroyed, players receive an extra point bonus.
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