The cosmos no longer seems so desolate and silent. Thanks to the numerous satellites and orbital stations, a lot of garbage rotates around the earth. But for some time, a serious defense strategy was required, because astronomers have noticed suspicious activity. Shortly thereafter, a chain of unknown objects of clearly reasonable origin began to move to our planet. It is necessary to put a barrier on the way to the Earth and for this you will have a set of ships and stationary guns, located on the right of the panel. The budget will not allow you to establish everything you want, but as you destroy extraterrestrial guests, you can strengthen the defense power in SH3 Earth Space Tower Defense.