Super Mario Bros., one of the first side-scrolling platform games, introduced video-game players to expansive(壮大な)worlds that forever changed the way video games were played, perceived, and designed. The game sold approximately 40 million units and holds the Guinness World Record as the best-selling video game of all time. It helped revitalize the floundering(立ち往生する、もがく)video game industry and made Nintendo one of the world's most recognized video-game manufacturers.