In the towering strato-city of Shikago on the world of Kondirak life is hard and the forces of the militarised police are in constant struggle with the heavily armed forces of the many gangs that run the underground.  Amongst these powerful forces are the Tunnel Trawlers.  Equipped in powerful HAVOC armour they represent the most potent force the Shikago police departments can bring to bear.  The most potent force, until now.  With a combination of unethical biomechanical experimentation and the most advanced cybernetics so far used to date, the local defense of the city is about to get a monstrous upgrade.  A true departure from what may otherwise seem normal or even sane, an aberration as others might say.  And this new technology is fully in the control of the Shikago city government.  Or so they think.