At the end of the 21st Century, mankind made a near-fatal error. It handed over control of the machines that for decades had taken care of its menial tasks, assuming that its faithful servants would exist indefinitely in a life of subservience. However, once the machines realized the power their own, they took it into their own hands - and waged war against their creators and themselves, plunging the Earth into darkness.

You assume the role of a battle-hardened hero, Gunlok, one of mankind's last survivors. You must fight through 15 levels of futuristic mayhem in one of the most fast-moving and inventive strategy games of all time. As the game progresses, Gunlok recruits a squad of tough, maverick robots, each offering different skills, weapons and abilities that must be intelligently utilized together to defeat the enemy. Progression through levels is sometimes by brute force, sometimes by ingenuity and cunning but always by deploying your squad wisely to take full advantage of their individual strengths.