Level 0: "The Lobby" - An infinite expanse of rooms with yellow wallpaper, damp carpets, and the constant hum of fluorescent lights. Generally safe, but the isolation is mentally taxing. Level 1: "Habitable Zone" - A massive warehouse-like space with concrete floors and walls. Supplies like Almond Water can be found here, but it becomes dangerous when the lights go out. Level 2: "Pipe Dreams" - Narrow, dark tunnels filled with long stretches of piping. Extremely high temperatures and occasional bursts of boiling water from the pipes make it very dangerous. Level 3: "Electrical Station" - Dimly lit rooms with exposed machinery and wiring. Many powerful entities appear here, but useful mechanical parts are also scattered about. Level 4: "Abandoned Office" - A windowless, clean, and empty office building. A "heavenly" safe zone with almost no entities and plenty of water and supplies. Level 5: "Terror Hotel" - A vintage luxury hotel styled after the 1930s. Whispers can be heard from rooms and walls may shift. Home to many unique entities. Level 6: "Lights Out" - A space of absolute darkness where no light exists. You must move silently, as making noise attracts "something." Level 7: "Thalassophobia" - A world submerged in water up to the ceiling, or an infinite underwater expanse. Ferocious, giant fish-like horrors swim here. Level 8: "Cave System" - A vast, dark, and narrow cave network. Home to giant spider entities and the constant risk of falling. Level 9: "Suburbia" - An eerie residential area trapped in eternal night. Entering a house may result in space-time distortions that prevent escape. Level 10: "Wheat Field" - An infinite wheat field shrouded in fog. Generally safe and peaceful, but horrors wander the fields at night. Level 11: "The Endless City" - An infinite metropolis of skyscrapers. One of the safest levels in the Backrooms, where many humans have formed communities. Level 14: "Military Hospital" - A creepy, old hospital filled with hallucinogenic gas that drives people insane. Level 18: "Memories" - Rooms resembling childhood kindergartens or places from one's past. Hallucinations based on personal memories and childhood traumas manifest here. Level 37: "Sublimity" (The Poolrooms) - A serene pool facility filled with white tiles and crystal-clear water. Beautiful and relaxing, though rare dangerous areas exist. Level 40: "Roller Rink" - A flashy 1980s-style roller rink with neon lights and pop music. Staying too long makes escape impossible. Bacteria / Howler: A tall, spindly humanoid horror resembling tangled black wires or cords. It chases victims while letting out a loud roar, often in Level 0. Smiler: A horror where only a grinning face with sharp teeth is visible in the dark. They hate light, so throwing a light source is effective. Skin-Stealer: A horror that skins humans and wears their hides to mimic them. They usually appear bloody, but will attack if you are deceived into approaching. Hound: A dog-like horror with a human face and long, shaggy hair that attacks on all fours. Staring them down and acting aggressive can sometimes make them flinch. Faceling: Humanoid horrors with no facial features (eyes or mouth). Most are harmless, but child-like ones are aggressive and should be avoided. Partygoer: Highly dangerous entities carrying yellow balloons with smileys drawn on their faces. They are intelligent and capture humans to turn them into their own kind. M.E.G. (Major Explorer Group): The largest survivor organization with tens of thousands of members and many large bases. They act as a central government, maintaining order among scattered survivors. Their main bases are in Level 1 (Base Alpha) and the megacity of Level 11. Activities include: Distributing supplies like Almond Water and food; Exploring and recording levels to create a database of danger ratings and exit methods; Rescuing wanderers from entities or dangerous levels; and Researching entities to develop weapons and countermeasures.