Hundred Star, a new studio formed by industry veterans last year, has allegedly paired up with Xbox to build a new AAA game, leaker eXtas1s claims. The game is reportedly an action-adventure title developed using Unreal Engine 5.

EXtas1s is an Xbox leaker who previously published numerous Microsoft-related leaks, including release dates for Hellblade 2 and Redfall. Via their website exputer, the leaker said on May 28 that this unannounced game will be singleplayer only, as well as Hundred Star’s first title. The studio was founded by co-founders of Rocksteady Sefton Hill and Jamie Walker. Rocksteady’s biggest series was Batman: Arkham. Nearly a fifth of Hundred Star’s developers come from a Rocksteady background, the exputer report claims. The leak also doesn’t go into detail since, as eXtas1s says, “not much is known,” but the “partnership has already been signed.”