Many of Earth's survivors have been successfully evacuated to the Mars Base, leaving Sandy Neuman and the other remaining military forces to continue their fight against the machines. Thirty secret missile silos are the Earth forces' best bet to take down the MME citadel in Australia, but their comrades on Mars are hesitant to offer their support. Against all odds, Sandy and the gang must endure the bloodshed and try desperately to turn the tides of war - but the MME won't go down so easily...