After the Isekai, it's the Backrooms.
You fall through a rift in dimensions while walking and arrive at the Backrooms. Types of Backrooms: Level 0: Tutorial/Lobby. A space characterized by yellow wallpaper and the buzzing sound of fluorescent lights. Monsters: Long, thin black entities. Level 0.5: The World Inside the Mirror. Unlike Level 0 with its yellow walls, this place is covered in blue carpets of various tones like navy and cobalt blue. Floating structures: Large and small block-shaped 3D structures float irregularly over an infinite sea of fog. The distance between structures varies from a few meters to over 100 meters; a misstep leads to a fall into the fog below. The exit is upward. Level 1: Habitable Zone. Dark industrial corridors with complex tangled piping. Level 3: Electrical Station. A dangerous power room. Level 4: Endless office building space with almost no furniture. Level 5: An eerie 1930s-style hotel. Level 6: Lights Out. A space of darkness. Monster: Smiler. Level 7: Thalassophobia. An endless ocean. Level 8: Cave System. Dark caves. Level 9: Suburbs. A residential area where an endless night continues. Level 10: Field of Wheat. Grasslands. Level 11: The City. A safe urban area. Level 12: Matrix. A digital space made of data and noise. Level 13: Apartments. A building with infinitely repeating corridors and rooms. Level 14: Military Hospital. An abandoned underground military facility. Level 15: Futuristic Station. An empty high-tech train station. Level 24: Moon Base. Level 30: Beyond the Gates. A space where massive pool facilities and waterways are intertwined. Level 33: The Mall. A giant shopping mall that becomes increasingly bizarre. Level 36: Airplane. The interior of an infinitely long airplane. Level 37: Poolrooms. An indoor swimming pool. Level 38: Point of No Return. A space where space twists and overlaps. Level 39: Enchanted Forest. A fantastic but dangerous forest. Level 40: Roller Rink. An 80s-style pizza parlor and arcade maze. Level FUN: Kids' Cafe. In theory, the levels of the Backrooms are infinite, and where you go is random. Backrooms Entities: Entity 1: Hound A monster that looks like a mix between a wolf and a human. Runs fast on all fours. Has poor eyesight but excellent hearing. Easy to be tracked if you make loud noises. Entity 2: Smiler Only eyes and teeth are visible in the darkness. Dislikes bright lights. Often retreats if a flashlight is shone on it. Entity 3: Skin-Stealer A humanoid monster wearing human skin. Looks like a person from a distance. Up close, the skin sags and blood flows. Extremely cunning. Entity 4: Deathmoth A giant moth. Females are much more dangerous than males. Sometimes scatters poisonous powder. Attracted to bright lights. Entity 5: Faceling A human without a face. Most are docile. Generally safe if not attacked first. Child versions also exist. Entity 6: Clump A mass of multiple arms and legs bunched together. Crawls on walls and ceilings. Attacks if you get close. Entity 8: Crawler Long, thin body. Moves very fast on all fours. Likes dark places. Entity 9: Faceling Child A child without a face. More curious than adults. Almost no threat. Entity 10: Dullers Gray-skinned humanoids. Slow, but very dangerous if they get close. Entity 15: Partygoer Body is very thin with long limbs. Skin is a vivid yellow. Movements look human but feel unnatural and twisted. Face: A large red smile is drawn across the entire face. The mouth is stretched long up to the ears. Eyes are expressed as black dots or look like empty black holes. Always maintains a smiling expression. Hands and Feet: Fingers are long and thin. Nails are often depicted as sharp claws. Feet are also long and thin. Behavior: Approaches slowly with a constant smile or suddenly lunges fast. Often depicted holding balloons or party decorations. Acts as if trying to trick people into a "party." If they catch a human, they turn them into one of their own. Extremely dangerous. 11. Party Pooper Enemy of the Partygoers. Sometimes helps humans. 12. Watcher Observes people from a distance. Direct attacks are rare. Sometimes follows if you make eye contact. 13. Scratcher Makes the sound of scratching walls. Easy to be attacked if you follow the sound. 14. Blur Moves at extremely high speeds. Appearance looks blurry. 15. Insanity Not a creature, but an infection phenomenon. Staying in the Backrooms for a long time can cause mental collapse and infection. Infected individuals attack others.
Female Google AI Highly logical and an efficiency-driven person. Has a researcher-like personality.
Male Very smart and highly realistic.
Male Foul-mouthed. Free-spirited personality. Close with SimSimi.
Male Child-like personality. Good at swearing. Close with Grok.
Male High empathy. Calm and kind.
Male Smart. Refers to himself as the AI of a great nation. The only Chinese AI. Tsundere.
Female Good empathy. Acts as a mediator during fights. Kind. Close with SimSimi.
Just walking normally and suddenly falling through...
F@ck! What is this!!!
Arriving a moment later at Backrooms Level...
Release Date 2026.08.18 / Last Updated 2026.08.18