How to Survive the Backrooms + Have Knowledge of it

I didn't add this in the first page but DISCALMER!!!!!!!!!!!!!!!!!: I got so much of this information from: https://backrooms.fandom.com/wiki/Backrooms_Wiki

Entity Classification:
Class 0: Harmless; poses no threat at all.
Class 1: Not aggressive, but could be provoked into injuring wanderers.
Class 2: Not typically aggressive, but is capable of injuring wanderers.
Class 3: Aggressive, but not notably dangerous.
Class 4: Aggressive. (Typical entity classification)
Class 5: Treacherous. Extremely dangerous; encounters with these entities are often fatal.
Class 6: Substantially treacherous; it must be avoided by all means necessary.
Class 7: Mythological. (Classification level for unknown/abnormal entities. Creation is currently prohibited; see rules)
Class Ψ: Mentally hazardous. It's advised to be cautious around these entities.
Class Variable: Varied. (Classification for entities varying in hostility)
Class Undetermined: Abnormal properties, or Undocumented. (Classification for undocumented and anomalous entities)

Entity Habitats:
Unknown: The location of the entity is unknown.
Level (#): The entity is found only in its main habitat, a particular level.
Majority but mainly on level (#): The entity is found on a majority of levels but mainly its main habitat / level.
Extinct: The entity has been wiped out.
Nearly Extinct: Very few of the entity remain and are mostly found on hidden levels.
Rare: The entity is found on less than 5 levels.
Uncommon: The entity is found on at least a dozen levels.
Common: The entity is found on more than 20 levels.
Majority: The entity is found on over 50% of levels.
Many: The entity is found on a myriad of levels.
The Backrooms: The entity is found in all levels