The Negative levels are series of levels that exist below Level 0. Entrance is typically possible by noclipping while in the backrooms.
Description
The negative levels typically cold, dimly lit grayish rooms in which sound appears to travel farther. Most levels contain eerily stagnant constant lighting.
Level -1
Level -1 is a connection point between levels -2,0, and 2 with it consisting of hallway that anomalously loops back to itself with doors to the aforementioned levels. Entry to ‘The whiteout’ is believed to also be possible in this level by no clipping through the walls.
Level -2
A picture of Level -2.
Level -2 is a flooded rundown office hallway that contains multiple submerged tunnels down to its sublevels. It’s sublevels consist of some of the most unexplored regions with only limited documentation available. It is however noted that Almond water frequently appears in this level, though it is noticeably cloudier in appearance and should be considered contaminated. The levels sub-levels are commonly known as "The Hall of Dull Flames", “The abyss”, and “The Kafkaesque Maze”.
A picture of “The Hall of Dull Flames“, taken by u/LoggoMyDoggo.
“The Hall of Dull Flames" is a relatively unknown region that resembles level 0, but contains a stained white carpet and baby blue walls lined with lanterns containing ominous color changing flames. Fluorescent lights line the ceiling, creating a a low humming sound but don’t seem to impact lighting. The distorted sound of a piano can be heard in the distance of the level, playing anything from Mozart to Tip-toe thru the tulips. The occasional red glow of the lanterns appear to affect entity behavior with Skin Stealers freezing when the red flames lanterns glow red before changing colors.
"The Abyss", an unexplored region that is only known to contain a seemingly never ending room shrouded in darkness.
“The Kafkaesque Maze”
A purple hedge stretching on for miles that is rumored to contain a hotel lobby that houses an entity named “The Shavic.” It’s also rumored that the lobby contains a set of stairs leading to level 14.
Level -3
Level -3 is an anomalous mirror room whose mirrors are capable of altering one’s apparent and physically reflecting them on contact. The level contains numerous hostile entities found on Level 3 like the Hounds but also some of its own like Entity ###, the Disco Balls, Hostile Floating Glass Icosahedra.
Level -4
Level -4 is what appears to be a tunnel with multiple layers to it. There have been a recorded 4 sectors, as well as 1 sub-sector, all of which have their unique properties and dangers added to it. Instead of oxygen being your friend, the stuff you breathe out (Carbon Dioxide) will take that role instead. There are a plethora of entities, each residing in a designated sector.
Level -5
Possible photo of Level -5.
Level -5 is a snow-covered landscape that features only the colors black and white (reminiscent of the appearance of early television) and is devoid of entities. It has been noted that like level -2, level -5 loops back in on itself anomalously. The level contains a single structure resembling the appearance of a WW2-Era Pillbox with a door on one side and a small stepped gun embrasure on the other. Distorted noises can be heard while inside the structure but their orgins are unknown.
Look at The Negative Levels for more levels.