City Guardian电脑版

Defend all the cities of the world against alien invasion, use you indestructible ship to stop any aliens or there weapons from reaching your city. The more cities you save the powerful you will become. Each wave will get steadily harder to defeat, Failure to save your city will result in your ship being downgraded.Use either the on screen game control to move your ship and change your firing angle or tap on the screen to do the same.