Open the door of a specific room. There are many special doors in Knight of the Air, which need to be opened with a key of 950 Gy. For example, the right-most stone gate in Detmouth behind the cemetery, the door of the small room on the top floor of the city warehouse guarded by winged sentries, and the manhole cover leading to the royal waterway of the city of tears are all open. Empty Knight is a 2D action adventure game, which was developed by TeamCherry, a three-person team from Australia.