One of the first games developed by the R&D4 department was "Mario Bros." in 1983, designed and directed by Miyamoto. The department was, however, unable to program the game with such an inexperienced team, and so counted on programming assistance from Gunpei Yokoi and the R&D1 department. One of the first completely self-developed games was "Super Mario Bros.", the sequel to "Mario Bros." The game set standards for the platform genre, and went on to be both a critical and commercial success. In 1986, R&D4 developed "The Legend of Zelda", for which Miyamoto again served as a director. The phenomenal sales of "Super Mario Bros." and "The Legend of Zelda" fueled the expansion of the department with young game designers such as Hideki Konno, Katsuya Eguchi, Kensuke Tanabe, Takao Shimizu, who would later become producers themselves.