Juggernaut

Most of the problems were solved in the 29th century. War was a memory. Disease was almost conquered. Old age and Death were held at bay. It was a glad world. A brave new world. Humanity had grown up. And then It came... At first the dare-devil pioneers from the far-flung corners of the universe brought back strange tales of a mountain that walked. The reign of terror spread from planet to planet, until the authorities sat up and took notice. By the time someone with enough initiative to re-open the long disused weapon shops, came on the scene, it was almost too late. Time was against them. Atomic bomb wouldn't smash that creature, neither would heat rays nor energy bolts. It left a train of utter chaos and devastation behind it as it strode imperiously through the galaxy.