The Backrooms are a made-up place that first appeared in a 4chan topic from 2019. The Backrooms, one of the most well-known instances of the liminal space aesthetic, are typically shown as an enormous extradimensional expanse of empty rooms that can only be entered by leaving ("no-clipping out of") reality.
The idea of the Backrooms has been developed online by users, who have added ideas like "levels" and dangerous animals that live there. American YouTuber Kane Parsons launched a series of Backrooms short videos on YouTube in the beginning of 2022, and they quickly gained popularity. The videos are credited with popularizing the idea and sparking a spike in Backrooms material. A24 is producing a cinematic version of Parsons' series that he will helm.
visit: https://backroomsgame.io