Ys I: Ancient Ys Vanished, also known as Ys: Ancient Ys Vanished - Omen, Ys: The Vanished Omens, Ancient Land of Ys or simply Ys, is a 1987 action role-playing game developed by Nihon Falcom. It is the first installment in the Ys series. Initially developed for the PC-88 by Masaya Hashimoto and Tomoyoshi Miyazaki, the game was soon ported to the Sharp X1, PC-98, FM-7, and MSX2 Japanese computer systems.