America's capital city is a smoking crater. Alien ships fill the sky over every major city on the globe. The world's protectors have been slaughtered trying to defend it and now humanity is fighting a desperate war for survival. A madman, once a proud American son -- fallen from grace and thought long gone -- has returned to wreak havoc on the planet he once called home. Out of sheer luck or a well-developed survival instinct, you have weathered the initial onslaught. With only yourselves and a sentient computer as your allies, you've sought out help from former enemies and made new friends. Now you're poised to strike back against the most powerful being the world has ever known.
Will your power be enough?