The Legend of Zelda is an action-adventure video game developed and published by Nintendo and designed by Shigeru Miyamoto and Takashi Tezuka. Set in the fantasy land of Hyrule, the plot centers on a boy named Link, the playable protagonist, who aims to collect the eight fragments of the Triforce of Wisdom in order to rescue Princess Zelda from the antagonist, Ganon. During the course of the game, the player sees Link from a top-down perspective and must navigate him through the overworld and several dungeons, defeating enemies and finding secrets along the way. It was originally released in Japan as a launch title for the Family Computer Disk System in 1986. More than a year later, North America and Europe received releases on the Nintendo Entertainment System in cartridge format, making the game the first home console title to include an internal battery for saving data. The Legend of Zelda was a bestseller for Nintendo, selling over 6.5 million copies. It is often featured in lists of games considered the greatest or most influential and is regarded as a spiritual forerunner of the role-playing video game genre. The game spawned several prequels and a number of spin-offs, establishing a series that has become one of Nintendo's most popular.