The three factions have 180 days to evacuate to Mars, but only enough resources remain for one group to get away. Earth 2150's single-play mode lets you play as one of the three forces. The game's graphics are simply terrific, with sensational weather effects and marvelously detailed structures and units.
Sound quality is disappointing, though, and navigating the interface definitely takes practice.
Those willing to learn its subtleties, however, will find Earth 2150 to be a complex and rewarding treat. Inc. All rights reserved.