The original Nintendo Entertainment System was released in the United States in August, 1985. Backed by classic games such as Super Mario Bros., The Legend of Zelda and Excitebike, the NES was instantly a hit. Its graphics were far superior to any home-based console that had come before it, leaving gamers with the feeling that their homes had been transformed into real-life arcades. The NES spawned a variety of interesting accessories, from R.O.B. the robot to the Power Pad controller, and went on to sell over 60 million units worldwide.