Company description
Levels: The idea was gradually broadened by fans to encompass several "levels" of the Backrooms.
The original Level 0 has buzzing lights, wet carpet, and endless yellow chambers.
Dark industrial areas, flooded maintenance tunnels, or even false utopias are examples of later stages.
Entities: As the mythology developed, people began to include odd or hostile "entities" that roam different levels, making investigation risky.