The Scourge are a race of foul, neuro-parasistic parasites that live by taking carbon based lifeforms as hosts. Though can live without taking a host, it is considered a lesser existence for them. Those that don't have hosts are often used to pilot their vehicles and space-craft. The Scourge are now the race on the defensive as the Reconquest has reached Earth. Can they defend what they took from humanity? Can they finally enslave all of humanity that is left? The answers to these questions are due to be answered in the Battle For Earth.