Hello loewemann, there is no headquarters. This is only part of the dialog of the fictional detective of the Migros Bureau of Investigation MBI. There is an area in the game which is called the "village". However, this area is only accessible after you have successfully played the first 14 levels. After that, the village can be reached via a button that is visible at the bottom center of the 3D valley, or via the visually identical button in the time travel view. Best regards, Susi