World of Final Fantasy (Japanese: ワールド オブ ファイナルファンタジー Hepburn: Wārudo Obu Fainaru Fantajī) is a role-playing video game developed by Tose and Square Enix who also published it. It was released worldwide for PlayStation 4 and PlayStation Vita in October 2016, for Microsoft Windows in November 2017, and for Nintendo Switch and Xbox One in November 2018. Returning to a more traditional gameplay style from earlier Final Fantasy titles, it revolves around turn-based battles which utilize the series' recurring Active Time Battle system, augmented with a stacking mechanic where stacking allied characters and monsters affects stats and turn numbers. An enhanced edition, called World of Final Fantasy Maxima, was released on November 6, 2018, and has have avatar change to transform into a classic Final Fantasy character.
World of Final Fantasy is primarily set in the world of Grymoire, a land populated by classic Final Fantasy characters and monsters from across the series, while being unconnected to any other series entry. The storyline focuses on twin siblings Lann and Reynn, who suffer from amnesia and hold the power in one of their arms to capture and wield Mirages, the monsters of Grymoire. Lann and Reynn travel to Grymoire to recover their memories, gradually mastering their powers and becoming involved in the conflicts consuming the world - these include fights between rival factions within the native Lilikins, and the impending threat of the Bahamutian Army.
Development started around the concept of a Final Fantasy title aimed at a wider and younger audience, focusing on a light tone and stylised graphics compared to the mainline entries. It was directed by Hiroki Chiba, who had worked as a scenario writer and event planner for the series and also wrote the scenario for World of Final Fantasy. The chibi character designs, which had been used for Pictlogica Final Fantasy, were created by Yasuhisa Izumisawa; the larger characters were designed by Tetsuya Nomura. The music was composed primarily by Masashi Hamauzu, who also included arranged versions of classic themes while aiming for the music to be lighter in tone.
First announced at the 2015 Electronic Entertainment Expo, World of Final Fantasy was intended as a celebratory title to commemorate the series' 30th anniversary. A worldwide release was planned from an early stage, with localization running parallel to the development and Japanese voice recording. In order to keep the characters true to their original appearances, the localization staff who first handled them were brought in to translate their dialogue.