World of Final Fantasy is a role-playing video game developed by Tose and published by Square Enix. It is a spin-off of the Final Fantasy franchise, featuring characters from across its mainline and supplementary entries. Initially released for PlayStation 4 and PlayStation Vita in 2016, it was later ported to Windows in 2017. An updated version, World of Final Fantasy Maxima, was released as a port for Nintendo Switch and Xbox One in 2018, with the PS4 and Windows versions receiving the Maxima update as downloadable content.
The game takes place in Grymoire, a world of coexisting Final Fantasy locations. The story follows siblings Lann and Reynn, who possess the power to tame monsters called Mirages, and are sent to Grymoire to reclaim their lost memories and thwart the plans of the Bahamutian Army. Returning to a more traditional gameplay style from earlier 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 statistics and abilities.