North American release. Game developed in Japan. See the original Famicom version for more information: "Jigoku Gokuraku Maru [Model PAC-9Z]".
Description from the back cover:
The setting - Earth, the future. The defense computer protecting the entire planet has been invaded by a constantly mutating, evolving virus. One lone volunteer has the courage to face the virus on its own ground. Converted to raw data and transferred into the circuits of the computer, the molecular structure of this brave warrior is transformed by the as-yet untested Image Transfer System. Into the circuits of the computer steps an unlikely hero - the Quantum Fighter! Six levels of challenging action, unequalled game control, and a surprising arsenal of weapons!