Metal Gear Solid's Cyborg Ninja is one of the 1998 game's most memorable characters, backflipping all over protagonist Snake with his chiseled exoskeleton and hissing haunting musings about life.

I originally had no plans to add a character like that." Kojima is referring to Gray Fox, better known as the cyborg ninja, who plays a key role in Metal Gear Solid and is core to some of the game ...