Exo-Levels are unique Levels that cannot be numbered by common means, their name comes from the fact that they are present outside of The Backrooms; functioning as a Hyperspace Bubble connected to The Backrooms by invisible strings.
Most common features Exo-Levels share is the fact that they dont have any Floors, and also seem to always take place in one space, and does not lead to any kind of Level or Floor related to none other than the Exo-Level itself.
﹥ Exo-Level 0 - "The Poolrooms"
﹥ Exo-Level 1 - "Deathrun"
└ Exo-Level 1-B - "Deathrun EX" - RESERVED FOR Lxnar_Whrxd
﹥ Exo-Level 2 - "The End"
﹥ Exo-Level 3 - "The Elevator Station"
﹥ Exo-Level 4 - "The Blue Channel"
﹥ Exo-Level 5 - "The Cogwell Matrix"
﹥ Exo-Level 6 - "The In-Between"
﹥ Exo-Level 7 - "Infinite Suburbia"
﹥ Exo Level 12 - "Outer Insulation"