Level 0.1

Level 0.1 is a hard to access sub-layer of the Backrooms, considered to be "in-between" Level 0 and Level 1, but closer to Level 0.

Description
It is structurally similar to Level 0, however the roof is made of stone slabs and the level is pitch black, only being illuminated by the occasional hanging lantern. There are three buttons in the level, which when pressed open the exit.

The size of Level 0.1 is thought to be roughly the same size as Level 0. However, since this level is so hard to get access to, your chances of meeting another person is astronomically rare. Your chances of winning the lottery 5 times in a row and surviving a lightning strike are higher than seeing a human being in this level. If you see a person, it's most likely a Stalker who is trying to trick you. It is suggested you move away if you see a person in Level 0.1.

Entities
There are reports of Screamers darting past peoples vision, abnormally large Clumps, Lighters which blind people, Stalkers, Hounds, Skin-Stealers, which for an unknown reason are passive in this level, and many reports of Six Arms.

Colonies and Outposts
Permanent civilizations are unfeasible in this level due to the harsh nature.

Entrances
There is a rare chance that wandering long enough in Level 0 may send you to Level 0.1.

Exits
There is unfortunately no way to escape back to Level 0 from Level 0.1. You seemingly get teleported with no trace of the void you fell through left. But for unknown reasons, you can reach other Sub-Layers such as 1.5. The other way of exiting Level 0.1, is to find a claustrophobic corridor and proceed to go in it. After walking around 400 meters you will find a black door, which will lead you to Level 0.7. One explorer reports he accidentally got into a negative level by breaking through a light fixture in Level 0.1, but this is unconfirmed.