Ys: Memories of Celceta, released in Japan as Ys: Foliage Ocean in Celceta (イース セルセタの樹海 Īsu: Seruseta no Jukai ), is an action role-playing game for the PlayStation Vita released in Japan on September 27, 2012, and in North America by XSEED Games on November 26, 2013. It was released for PC through Steam on July 25, 2018. A PlayStation 4 version with enhanced graphics is released in Japan on May 16, 2019.
It is the third game to be considered Ys IV, but the first to be developed by Nihon Falcom, who developed the rest of the Ys series. It replaces Tonkin House's Ys IV: Mask of the Sun and Hudson Soft's Ys IV: The Dawn of Ys within series canon.
While technically a remake of Ys IV, it is hinted that it may merely be a third interpretation of Ys IV.