Quite often, many people forget their keys or their locks fail. When this happens, the doors close and cannot be opened normally. You in the game Open 100 Doors will be a master who will deal with the opening of broken doors. In front of you on the screen you will see the room in which the door will be located. That is what you will have to open. Examine everything carefully. You will need to solve some kind of puzzle in order to gain access to the castle and then open it. As soon as you do this, you will be given points in the game Open 100 Doors and you will move on to the next level of the game.