Developers Rocksteady Studios revealed today that work on Batman: Arkham City had already begun before the end of the development of Batman: Arkham Asylum. The test is hidden in the very first game, in a secret room is not marked on the game map, invisible to the sight of the Dark Knight detective and accessible only by demolishing a wall with several explosive charges. The room, part of the asylum office director Quincy Sharp, contains a map of the future Arkham City with two of the artwork.

Here we propose a video showing you how to find this room in the game, along with an image of the map itself where we can see how Arkham City is connected directly to the Arkham Asylum: It looks like we will have the chance to explore both areas .

Batman: Arkham Asylum - Secret Room