D.

Kawamata is a psychotic soldier who fell in with the Russian Special Operation Forces. It was at this time that Kawamata became the guinea pig for this secret scientific research organization. The Russians wanted to ensure that they were ahead of the U.S. in the arms race, and used this organization to develop a mobile combat suit, armed to the teeth with all kinds of weapons imaginable. During his tenure on the project, Kawamata met Matsuzaki, a twisted scientist who was kicked out of Japan...