Who could have predicted that a simple mining mission would end up jeopardizing the entire known world?
When a couple of dwarves keep pushing deeper and deeper into the earth to find new veins of mithril to extract, what they unearth, however, is the doom of their race. Bursting out of the breach they created is a horde of powerful demons that only know one thing: to destroy.
Fast-forward a few months and the war rages on. Unfortunately for them, despite their bravery, the dwarves are no match for the sheer numbers and ferocity of their adversary.
In a last-hope attempt to save their kind, they decide to activate a secret project their engineers had been working on: a mobile factory made of bricks, brass, magical runes and soul gems. That sentient machine is not only capable of observing and learning from its foes, it can also produce the required weapons necessary to strike back.
This Factory Core-as they call it-will need to build units and defensive mechanisms to repel the demon army and prevent it from razing the city. But this will prove to be an almost impossible task as the invaders, led by a vicious commander, have more than one trick up their own sleeve...