Final Fantasy XV is getting perhaps its most surprising spinoff yet. It’s a new game developed by the company behind ubiquitous mobile games Game of War and Mobile Strike.

Few details on the game are available just yet, but Square Enix says that it will be a mobile massively multiplayer online game set in the ever-growing FFXV universe, featuring “the characters, storyline, and soundtrack” of the game. FFXV launches later this month, but the game’s world has already been fleshed out through an anime series, feature-length CG movie, and several mobile games.

The new, untitled game is being created by MZ (formerly Machine Zone), the California-based developer behind the incredibly lucrative Game of War and Mobile Strike. The company is perhaps best-known for its celebrity-filled TV commercials, featuring the likes of Mariah Carey and Arnold Schwarzenegger pitching multiplayer mobile games. MZ has since taken the infrastructure it built to connect millions of gamers online in real time, and expanded its uses to other avenues, most notably transit infrastructure.

No release date has been announced, but the FFXV mobile MMO will be developed by a brand-new internal MZ studio. FFXV, meanwhile, is launching on PS4 and Xbox One on November 29th.