Planet Defense is a sci-fi tower defense game. Meteorites invade the Earth, and all you have to do is protect the Earth and discover new planets in the Milky Way! Planet Defense Android version is novel and interesting, full of features, simple and easy to use, and has added a variety of levels for players to challenge. It should be noted that the cooling time of the game buttons is limited, and players must use them reasonably. Interested players may wish to download and give it a try!