Sega ALLS UX (FGO Arcade) Fate/Grand Order is an online, free-to-play Japanese mobile game, developed by Delightworks using Unity, and published by Aniplex. You do NOT need to watch any of the other Fate Anime in order to enjoy the new anime Fate. What does FGO mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: FGO. Fate/Grand Order or simply FGO is a Japanese mobile role-playing game that's based on the Fate/Stay Night franchise that's well-loved for its.