Zed Blade - In-Box - Neo GeoThe general premise in the series is that a scientist, Dr. Brown, having perfected a time machine, organized a tournament for various fighters throughout all of history to combat each other to see who is the world's mightiest fighter. True to this plot, many of the fighters are based on actual historical figures. This game also marked the debut of Jack and Ryofu, which many players considered to be unfairly powerful.