In the future the resources of earth have all but dried up. The mega corporations have turned their gaze upon nearby asteroid belts for their rich wealth of resources. As an independent prospector you are tasked with establishing colonies on the richest and most strategic asteroids and selling them off to the highest bidder.
This represents a more standard ship battle with a total of 302 combatants. Of course the completed game will allow several times that, as well as ground defenses and many classes of ships.