War has come to Earth. Millions are dead or dying in a massive alien invasion, in what might possibly mean the end of Humanity as a whole. Our last hope rests with XCOM, a secret organization comprised of the best soldiers, Scientists, and Engineers to help beat back this invasion. A simple mistake by Rainbow Dash thrusts her and many other ponies into this war-torn earth, as XCOM and Equestrians now stand side by side to stop this invasion.