In the universe of "Hostile Dimension", there are two dimensions of reality, you're on the sides of humanity against alien who come to your dimension. A small part of the alien joined the people, due to internal discord aliens. You have to choose one of three races and one of the three types of ships, and your task is to endure as long as possible against the advancing aliens. Promote, upgrade, check your score in global ranking. Play co-op with friends, or in multiplayer (LAN) against them. In the case of considerable interest and support will also be running a official game server.