Backroomism

Backroomism states that the Backrooms are a real and actually-existing open space outside of normal reality. The story of the Backrooms initiated on 4chan in 2019 when a photo of the yellow, musty interior of a building (now known as Level 0) was posted. Over time, this story spread to Fandom and Wikidot, with hundreds and potentially thousands or millions of levels being a part of the canon. The highest known level number in the Backrooms is 9223372036854775807, the highest 64-bit signed integer. Transportation between different Backrooms levels is done by "no-clipping" through different means and gateways in the Backrooms, often leading to other sections of the Backrooms. There are some ways to leave the Backrooms, such as completing tasks in Level 3999, and there are some levels that are extremely hard to escape (e.g. the Void).