The year is 2038. Human civilzation has been devastated by a full-scale nuclear war. Radiation sweeps across the barren wastelands, making life nearly impossible.

However, a few prepared people began new life underground, traveling below the surface of the Earth in old mine shafts. Here, man waited for the time when he could return to the top-world.

Expecting to start a new era of peace, giant underground cities arose, and new tunnels were cleared. But competition for scarce resources has driven the survivors to war once again.

Tunneling machines and resources have been turned into tools of war.