Terminal Gamer writes; "The year is 2156 and the earth is overcrowded. The Union government decides to establish lunar prison colonies to remove the undesirable criminal element from the population. In 2169, uraniam-235 is found deep under the moons surface and the colonies are forced into hard labor mining this resource. In 2185, the lunar colonies organize and rebel against the outnumbered Union security forces. Two years later, they have named themselves Xenos and announce their intentions to annihilate all life on Earth with a newly created super-weapon. Union forces invade the moon to stop them and the moon is plunged into military madness."