The blood feud between the underground cities of Darkreach and Markon have finally reached a tipping point: The Autobots and Decepticons clash in the battlegrounds between the city to determine the fate of the planet's depths! Will the Decepticons conquer Markon, the wealthy city of weaponsmiths, or will the Autobots take Darkreach, and discover the feral secrets of Cybertron's core?