Welcome in The List of Sub-Levels of The Backrooms
(Please don't delate this, it makes it easier to find every Sub-Level, because there is many sub-levels that weren't mentioned in Level List. Hope you can understand).
Note: Feel Free to add more Sub-Levels.
List:
Level 0.1 “Danger Zone”
Level 0.7 “The Dark Lobby”
Level 0.9 “The Maintenance Tunnels”
Level 1.5 “Inverted”
Level 2.2 “Bee Hives”
Level 4.3 “Decayed”
Level 4.5 “Whispering Halls”
Level 4.7 “The Construction Site”
Level 5.5 “Can’t Stop Watching”
Level 6.1 “The Snackrooms”
Level 6.22 “In, and Out”
Level 7.2 “Sunken Titanic”
Level 7.5 “Screen Saver”
Level 9.2 “Cul-De-Sac Chaos”
Level 19.1 "Under Brittle Floor"