For a catalog of levels, visit Levels or Clusters. If making one, it's recommended to take a look at this first. For a list of anomalous levels or negative levels, visit Anomalous Levels. For a list of rooms, visit Rooms. If you're looking for some laughs, visit Joke Levels.
Normal Sub-Levels
Level 0 “The Lobby”
- Level 0.03 "Deathly Mansion"
- Level 0.032 “House of Rooms”
- Level 0.033 "House of Memories"
- Level 0.034 "House of Teddy Bears"
- Level 0.08 "Stalagmite Staircases"
- Level 0.1 “Danger Zone”
- Level 0.11 "The Rotting Lobby"
- Level 0.2 "Cognito-Halls"
- Level 0.22 "Fully Remodeled"
- Level 0.3 "Confusing Geometry"
- Level 0.4 “The Crimson Tunnels”
- Level 0.42 “Fear Stress Test”
- Level 0.45 "The Big Room"
- Level 0.5 “The Cubed Space”
- Level 0.55 "Future Void"
- Level 0.6 “Hotel 0.6”
- Level 0.666 "The Burning Lobby"
- Level 0.675342 “The Uninhabitable Lobby”
- Level 0.7 “Distorted Level”
- Level 0.8 "Strange Doors"
- Level 0.9 “The Maintenance Tunnels”
- Level 0.91596559417721901505460351493238411077414937428167 (No name provided)
- Level 0/1 "The Habitable Lobby"
- Level 0 L (The Leftrooms) "The Piano Ground"
- Level 0 R (The Rightrooms) "The Lobiy"
Outrooms
- Level 000.1 "Sets Of The Sky Islands"
Level 1 “Habitable Zone”
- Level 1.001 "A Chilly House”
- Level 1.05 “The Small Hallways”
- Level 1.1 "Corrupted Corridor"
- Level 1.13 "Supermarket of Reality"
- Level 1.1905 "The Infinite Elevators"
- Level 1.2 “The Abandoned Mansion”
- Level 1.25 "Futuristic Town"
- Level 1.272 "Dark Isolation"
- Level 1.3 “The Core”
- Level 1.4 "Hallways Of Hallways(real name is unknown)"
- Level 1.5 “Decidophobia”
- Level 1.6 "The Concrete-Cognito"
- Level 1.7 “Trashed Forest”
- Level 1.8 "Lilac Antechambers"
- Level 1.85 "Lilac Oblivion"
- Level 1.9 "The Dark Connection"
- Level 1-1 "The Lost Concrete"
- Level 1 L (The Leftrooms) "Narrow"
- Level 1 R (The Rightrooms) "Habitable Park"
Level 2 “Pipe Dreams”
- Level 2.1 "Steampunk Corridors"
- Level 2.2 "The Moldy Tunnels"
- Level 2.4 “Gated Corridors"
- Level 2.6 “The Wooden Tunnels”
- Level 2.7 {UN-NAMED}
- Level 2.75 “Apeiro Vestibules”
- Level 2 L (The Leftrooms) "The Hallway Of The Collections"
- Level 2 R (The Rightrooms) "Tunnel Made up Of Pipes”
Level 3 “Electrical Station”
- Level 3.14 "Level Pi/Level π"
- Level 3.2 "Wired Industry"
- Level 3.3 "Deeper Zones"
- Level 3 L (The Leftrooms) "Space Station"
Level 4 “Abandoned Office”
- Level 4.04 "Unrecognizable Offices"
- Level 4.1 “Infested Office”
- Level 4.3 "Liminal Offices"
- Level 4.5 “Whispering Halls”
- Level 4.6 "The Infinite Offices"
- Level 4.9 "Underground Office"
- Level 4 L (The Leftrooms) "Dotted Office"
- Level 4 R (The Rightrooms) "Cluttered Cubicles"
Level 5 “Terror Hotel”
- Level 5.1 "Blinding Lights"
- Level 5.11 "The Storage Area"
- Level 5.2 "The Abandoned hotel"
- Level 5.4 "The Basement Hallway"
- Level 5.5 "Eerie Victorian Mansion"
- Level 5.7 "The Hotel Hallways"
- Level 5 L (The Leftrooms) "The Motel"
- Level 5 R (The Rightrooms) "The Dormitory"
Level 6 “Lights Out”
- Level 6.05 "The Blenderrooms"
- Level 6.1 “The Snackrooms”
- Level 6.2 “The Thrift Store”
- Level 6.3 “The Gun Store”
- Level 6.4 "Lights On"
- Level 6.5 "Flooded Warehouse"
- Level 6 R (The Rightrooms) "Hypermarket Hell"
Level 7 “Thalassaphobia”
- Level 7.3 "Flooded Bunker"
- Level 7.5 “Screen Saver”
- Level 7.7 “Buzzing Beehives”
- Level 7.8 "The Gleaming Barn"
- Level 7.𝘓 “Opposite Oceans”
Level 8 “Cave System”
- Level 8.3, "Gemstone Cave"
- Level 8.6 "Martian Caves"
- Christmas Caves
Level 9 “Darkened Suburbs”
- Level 9.1 “Snow Suburbs”
- Level 9.11 "Lighter Suburban"
- Level 9.2 “Get Out Ghetto”
- Level 9.3 “Lost Apartments”
- Level 9.5 “Foggy Forest”
- Level 9.7 "Good Night"
- Level 9.9 "The End of The Road"
- Level 9.11 "Lighter Suburban"
Level 10 “Infinite Field Of Wheat”
- Level 10.1 “The Breakroom”
- Level 10.2 "Beautiful Field at Night"
- Level 10.3 "A Field of Corpses"
Level 11 “The Infinite City"
- Level 11.1 "The Aesthetic City"
- Level 11.111111111111111 “Remodeled City"
- Level 11.12 "Building Sweet Building"
- Level 11.3 "Graffiti Street"
- Level 11.6 “Infinite Parking Garage”
- Level 11.72 "Contained Skyscrapers"
Level 12 "Matrix"
- Level 12.1 "The GreenScreen"
Level 13 “The Apartments"
- Level 13.13 "Halls of El Dorado"
Level 14 "Military Hospital"
- Level 14.6 "Beyond Repair"
Level 15 "Futuristic Halls"
- Level 15.1 "Central Processing Unit"
Level 16 "5-Story Labyrinth"
- Level 16.5 "The Missing Institute”
Level 17 "The Carrier"
- Level 17.1 (UNIDENTIFIED LEVEL)
- Level 17.2 "Navy Vessel"
- Level 17.5 "Cruise Ship"
Level 18 “Memories”
- Level 18.3 “The Woodlands”
Level 19 “The Attic”
- Level 19.1 No name available
Level 36 “The Airport”
- Level 36.5 “The Plane”
Level 37 "The Poolrooms"
- Level 37.3 "Forest Luxury"
- Level 37.5 "The Pool Of The Hotel
Level 41 “Detention Halls”
- Level 41.1 "The Room"
Level 44 “The Alternate Reality”
- Level 44.5 “The Exhibits”
Level 81 “Endless Pizzeria”
- Level 81.1 "Pizza Party"
Level 83 “Field of Roses”
- Level 83.212 “Yellow Brick Road”
Level 124 "The Purplerooms"
- Level 124.1 "The Dreamzone"
Level 188 "The Windows"
- Level 188.1 "The Unexistent Layer"
- Level 188.2 "Windows of Darkness"
Level 375 “TOTALLY Normal Restaurant”
- Level 375.01 “The Security Room”
Level 571 "Dark Bathrooms"
- Level 571.5 "Origin of Bathrooms"
Level 611 "A Flavor of Light and Dark"
- Level 611.1: "The Unorganized Basement"
Level 679 "The Dark City"
- Level 679.2 "The Infinite House"
Level 708 "Karaoke Lounge"
- Level 708.8 "Marionette"
Level 777 “The Judgment Day”
- Level 777.5 “Event Town”
- Level 777.9 “The Luxury Trip”
Level 837 "Fake"
- Level 837.2 "Wacky Wonder"
Level 858 "The Infinite Aquarium”
- Level 858.1 “The Abandoned Aquarium”
- Level 858.2 "The Crimson Aquarium"
- Level 858.3 "The Glitched Aquarium" (This is a remake)
Level 1000 "Cardinal Level"
- Level 1000.1 "Almond Lobby"
Level 1205 "The Purple Space?"
- Level 1205.2 "The Purple-Poolrooms"
Level 1376 “An Alarming Alleyway”
- Level 1376.1 "Obliterated"
Level 1472 “Void Maze”
- Level 1472.1 "Balance Yourself"
Level 1975 "Glitched Room"
- Level 1975.1 "Do you remember me?"
Level 2525 "The Cornfield"
- Level 2525.3 "The Pumpkin Patch"
Level 2508 "Make us whole"
- Level 2508.1 "ꀤ ꉓꍏꈤ'꓄ ꌃꋪꍟꍏ꓄ꃅꍟ"
Level 3999 "True Ending"
- Level 3999.5 "Once a Home"
Negative Sub-Levels
Level -0 "Inverted Halls"
- Level -0.2 "When You Look In The Mirror"
- Level -0.7 "Peaceful Dreamscape"
Level -1 “Glitched Halls”
- Level -1.1 "Doorways"
- Level -1.5 "The Waters"
Level -2 “Overflow”
- Level -2.1 "Hotel Freedom"
Level -4 "Carbon Tunnels"
- Level -4.1 "Under Maintenance"
- Level -4.2 "The Forest"
- Level -4.6 "Cardboard Box Maze"
Level -6 “Lab of Hallucinations"
- Level -6.3 “The Fallenrooms”
- Level -6.4 “Paradise...?”
- Level -6.5 “The Super Snackrooms”
Level -9 "Unnamed Level"
- Level -9.1 "Unnamed Sub-level"
Level -11 "The Mind-games Room"
- Level -11.11 "Unnamed Sub-level"
Level -33 "Lukewarm Hotel"
- Level -33.1 "The Frost Hotel"
- Level -33.2 "The Burning Hotel"
Level -150 “Infinite Night Club”
- Level -150.1 "The Neon Hotel!"
- Level -150.2 "Abandoned Nightclub"
- Level -150.! “Dance till your DEAD”
Enigmatic Sub-Levels
Level ' “Liminal Neighborhood”
- Level '.1 “Dangerous Place”
- Level '.2 “The Backstreet of Many Stories”
- Level '.3 “Corrupted Neighborhood”
- Level '.4 “Running is the only way”
Level ! "Run For Your Life!"
The Maze Center
- Maze.1 “Maze of Vents”
Level SYNTAX ERROR "The Test Level" (Level 40404)
- Level SYNTAX ERROR.1 "HTTP 404 NOT FOUND ERROR" (Level 40404.1)
You can add additional sub-layer levels to this.