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Use the mouse to aim and shoot asteroids.
Global Defense System is a free online arcade game where you will engage a survival combat to prevent asteroids from hitting Earth. With the given turret and the shooting ability that you have, you can launch decisive shots at the target before they fall onto the ground. After each completed level, you will have the chance to use the money you have earned in purchasing upgrades for the next wave. Let's play the first stage and check your skill now! Good luck!