About Zelda 2: The Adventure of Link: This is an action-adventure game developed and published by Nintendo for the Nintendo Entertainment System, and the second installment in The Legend of Zelda video game series. It was originally released in Japan on the Famicom Disk System less than a year after the release of the original Legend of Zelda, and converted (with various upgrades) to the NES cartridge format when released in the United States and other countries in 1988. The Adventure of Link is a direct sequel to the original The Legend of Zelda, and again involves the protagonist Link on a quest to save Princess Zelda, who has fallen under a sleeping spell. The Adventure of Link's emphasis on side-scrolling and RPG-style elements, however, was a significant departure from its predecessor (The Legend of Zelda) and has given it a reputation as the "black sheep" of the Zelda series. Despite being the least popular entry in the series (both in popularity, and in sales), the game was highly successful and introduced many elements that would become commonplace in future Zelda games. It was followed in 1992 by The Legend of Zelda: A Link to the Past for the Super NES.