Level ! consists of a long hallway, approximately ten kilometers in length, with its structure resembling that of a hospital. The hallway has several doors, each one approximately three meters from each other. There are also bright, flickering exit signs for the entirety of the level, each one about ten meters from each other.

Upon reaching the ten kilometer mark, one will come upon an exit door at the end of the hallway. Entering it will lead to a random level, with the Backrooms never sending them back here again. If the horde of entities catches them, however, the victim will be killed in a very painful and gruesome way. The hallway possesses turns, one each few kilometers, leading to a wanderer thinking they've reached the exit early. If you see the exit door, but notice a turn in the hallway, do not go into the door as it's a fake exit and it will lead you into an empty room, resulting in you being caught by the entities.