. . . . . . "''Ys'' series of video games" . . . . . . "''Ys''" . . . . "''Ys'' video game series" . . "Ys I and II" . . "''Ys'' (series)" . . . . . . "Ys series" . . . "Ys (series)" . . "''Ys'' games" . "Ys" . . . . . . . . . "''Ys'' series" . . "Ys (series)" .