Bitsburgh has been evacuated. R4N-D mechs and drones have swarmed the streets. It's up to you, as the pilot of the mysterious mech IOTA, to take down the enemy threat and bring peace back to the city. If, of course, you don't destroy it in the process.
Arm yourself with an array of powerful weapons scattered throughout the city, as well as your own two giant robot fists and some chaos-causin' rocket launchers - and destroy all enemies!