Kotaku - Long ago, the world was nothing more than an endless sea cloaked in a boundless sky, reaching as far as could possibly be imagined. Then two great titans came into existence. The Bionis and the Mechonis. The titans were locked in a timeless battle. Until at last, only their lifeless corpses remained. Eons have passed. Now, our world, this vast land stretching across the remains of the Bionis, is under attack by a relentless force known as Challenger Approaching!