Space Station: Frontier

The supervisor is searching for valuable resources in the farthest corners of the Solar system. It was peace until there was a race that challenged the right to possession of the territory. You have to protect the territory and increase the fire power. The tower defense style interface can be used to build weaponry and mining tools. They need to expand the base and defend it against aliens. Your space station can be upgraded to increase its power and abilities. The mode is where you are the last chance for survival. You can play free modes and play with other players.