Ys I: Ancient Ys Vanished (イース Ancient Ys Vanished Īsu) (also Ys: The Vanished Omens or The Ancient Land of Ys) is the first installment of Ys, an action role-playing video game series developed by Falcom in 1987. The name is commonly misspelt Y's due to an error on the packaging of an English-language release. Initially developed for the PC-8801 by Masaya Hashimoto (director, programmer, designer) and Tomoyoshi Miyazaki (scenario writer), the game was soon ported to the X1, PC-9801, FM-7/FM-77, FM-77AV and MSX2 Japanese computer systems. Ancient Ys Vanished saw many subsequent releases, such as English-language versions for the Master System, MS-DOS, IIGS, and TurboGrafx-16, and enhanced remakes for the Saturn and Windows systems. The game was also released as part of a compilation, Ys I & II, for the PC Engine/TurboGrafx-CD in 1989, along with its 1988 sequel Ys II. It has also been released for the Nintendo DS.