Super Probotector: Alien Rebels [1992] / Contra / SNES

The Probotecotr is a fighting robot that was developed in top secret by a special scientific mechanized unit.
It is the year 2636. Once again the aliens who lost in battle to the Probotector have regained their full strength and have begun a large-scale invasion. Humans are mere rag dolls in the face of the aliens’ overwhelming resources, scientific capability and powerful life force.
Six months later, two fighting robots appear in the devastated city controlled by the aliens, -RDOO8 and RCO11- the strongest Probotectors in history.
A Heated battle begins once more.

Super Probotector manual page 3