The , called the for short, is a coin-operated video game platform designed for two-player competitive play using the VS. UniSystem or VS. DualSystem, arcade system boards based on the Nintendo Entertainment System. Many of these stand-up or sit-down arcade machines had two screens and controls joined at an angle. These games were ported to arcade hardware from existing home video games for the Family Computer and Nintendo Entertainment System; thus, they could be sold cheaply to arcades in the late 1980s.