Play GlobalDefenseSystem Game Online

Information:Play GlobalDefenseSystem game online It'up tp you to save the world from a wave of asteroids that are heading straight towards earch!Upgrade and buy weapons platforms between levels,Every weapons plarform has the capacity to hold up to 2types of ammo.Keys Q,W,E select secondart ammo while keys A,S,D select main ammo for platfroms 1,2 and 3.Earn cash by destroying asteriods.Automated turrets can be purchased,Turrets require visibility in order to function well,You can increase visibility between levels.