Nintendo's platform game "Super Mario Bros.", released for the Nintendo Entertainment System in 1985, became the archetype for many scrolling platformers to follow. The title went on to sell over 40 million copies according to the 1999 Guinness Book of World Records. Its success contributed greatly to popularizing the genre during the 8-bit console generation. Sega attempted to emulate this success with their "Alex Kidd" series, as well as with the "Wonder Boy" series. The later "Wonder Boy" games were also notable for combining adventure and role-playing elements with traditional platforming.