Metal Arms: Glitch in the System
Get General Corrosive:
In the final muliplayer level you unlock, find his body, go into it and crush the opposition with his fists and stomp missiles.
Get the Multiplayer Levels by getting the indicated number of gold chips:
|8||Matt's Big Gun Fun|
|25||The Reactor Factor|
|40||DMA Death Sphere|
Thanks to Revolution readers Mark SIngleton and Asianus!