The Complete ‘Backrooms’ Lore Explained – From a 4chan Thread to an A24 Blockbuster

Few pieces of internet mythology have traveled as far, or as fast, as ‘Backrooms.’ What started as a single anonymous image post has become one of the most fully realized examples of crowd-sourced horror ever to emerge from online culture, and it now has a major studio film to match.

The concept behind ‘The Backrooms’ is deceptively simple, which is precisely why it works. The original image and concept were first posted on 4chan in May 2019 by an anonymous user, and it mushroomed into a sprawling, crowd-sourced mythos of liminal horror, an extradimensional maze entered by “no-clipping” out of reality, populated by levels, entities, and improvised histories created by fans.

The Original 4chan Post That Started a Phenomenon

The seed of the entire mythology can be traced to one now-legendary comment. A user in that 4chan thread shared one very important comment alongside an image of strange, steel structures in the water, which read:

“If you’re not careful and you noclip out of reality in the wrong areas, you’ll end up in the Backrooms, where it’s nothing but the stink of old moist carpet, the madness of mono-yellow, the endless background noise of fluorescent lights at maximum hum-buzz, and approximately six hundred million square miles of randomly segmented empty rooms to be trapped in. God save you if you hear something wandering around nearby, because it sure as hell has heard you.”

That single paragraph handed the internet a mythology on a plate. The devotion to building out the lore of ‘The Backrooms’ was so feverish that people spent years trying to find the actual original image that started it all, and as reported by Boing Boing in 2024, it was revealed to have been taken in 2002 at a HobbyTown franchise in Wisconsin that was being renovated. The detective work alone speaks to how deeply the community had invested in the fiction.

Thanks largely to that 4chan thread, ‘The Backrooms’ became a wildly popular creepypasta in certain corners of the internet, not entirely unlike other famous creepypastas before it. Users did precisely that, helping to create the sub-genre we now refer to as liminal horror.

Backrooms Lore and the Fan-Built World of Levels and Entities

The reason ‘The Backrooms’ grew so explosively is that the original post left almost everything undefined. Because the original post supplied only atmosphere and a few rules, fans filled the blank space by inventing numbered “levels,” malevolent entities, objects, and groups, creating sprawling wikis, timelines, and in-universe organizations that read like collaborative worldbuilding rather than a single authored myth.

A dedicated fandom began to develop around the Backrooms, with creators seizing upon the opportunity to expand upon the original narrative, crafting additional floors or “levels” and inventing entities to populate them. Fan-made video games became a popular extension of this, pulling players deeper into the lore through interactive horror.

Unlike traditional liminal spaces that evoke mild unease, ‘The Backrooms’ capitalize on claustrophobic fear, dread, and being trapped in a surreal maze with malevolent entities lurking around, combined with a specific kind of nostalgic familiarity.

Multiple fan-run wikis and Fandom pages have not only cataloged levels and entities but spun long timelines and even in-world conflicts, with entries describing a “War of Level 248,” splinter states, and organizations like M.E.G. attempting to manage or settle parts of the Backrooms, illustrating how collaborative worldbuilding has produced competing canons.

The Backrooms community is riven by a persistent tension, with some users prizing the original, isolating terror of an empty, liminal space, while others embrace expansion and narrative complexity, which can transform dread into plot-driven spectacle. A subreddit called r/TrueBackrooms even pushed back explicitly against the escalating world-building, preferring to preserve the ominous simplicity of where it all began.

Kane Parsons and the YouTube Series That Changed Everything

The single biggest leap ‘The Backrooms’ took toward mainstream recognition came from a teenager with a camera and a talent for 3D animation. On January 7, 2022, Kane Parsons posted a nine-minute short film to YouTube titled ‘The Backrooms (Found Footage),’ depicting a young filmmaker who falls into an unsettling dimension consisting of seemingly unoccupied office space.

After his first liminal horror-based video quickly went viral in 2022, Parsons made around two dozen videos expanding on the lore of ‘The Backrooms,’ and together they have amassed more than 197 million views on YouTube.

The web series, set primarily in the 1990s, revolves around the Async Research Institute, a fictional research institute that discovers the Backrooms and attempts to study and document it, with missing person cases skyrocketing as people are pulled into what the series calls “the Complex.”

What made Parsons’ work stand out even among a sea of fan content was not just the visuals but the internal logic he applied. Parsons was careful to maintain his initial logic for the world, stating: “I always try to stay away from the idea that the backrooms is somehow a dreamy headspace thing where, if you turn around, the room could have changed. It preys on the human brain’s ability to map spaces and understand them.” That commitment to consistency became the foundation for everything that came next.

The A24 Film and the Next Chapter of the ‘Backrooms’ Universe

The leap from YouTube to theatrical release is one of the more remarkable origin stories in recent horror history. Parsons had been in talks with distributors, including A24, about a ‘Backrooms’ movie since he was 16, and the finished product is now a genuine cultural event. He is now A24’s youngest feature director and one of the youngest directors ever to lead a studio feature at 20.

Chiwetel Ejiofor, Renate Reinsve, Mark Duplass, Finn Bennett, and Lukita Maxwell star in the film, and the cast is supported by producers including Osgood Perkins and James Wan. The horror film follows a therapist who must enter into the Backrooms, a collection of liminal, eerie spaces originally inspired by 4chan memes, to find a patient who has disappeared.

Unlike Parsons’ found-footage YouTube series, which relied on Blender for its visuals, the big-screen version reportedly uses practical sets, with Parsons and his crew building a whopping 30,000 square feet of Backrooms, a space so large that sometimes the cast and crew would get lost on the set. Having already grossed more than $10 million in previews, ‘Backrooms’ is already poised to be a box office hit.

Why the ‘Backrooms’ Resonates Far Beyond Horror

The staying power of ‘The Backrooms’ is not simply about scares. Analysts link its appeal to the psychology of liminal spaces, the uncanny familiarity of office carpets and fluorescent lights that taps into modern anxieties about bland, corporate environments and the thinness between reality and simulation.

Even ‘Severance’ creator Dan Erickson confirmed that ‘The Backrooms’ was one of his many inspirations when working on the Apple TV+ show, underlining how deeply this piece of internet mythology has seeped into prestige television and beyond.

That decentralized origin explains why there is no single canonical ‘Backrooms’ story today, with the concept having been expanded across YouTube videos, wikis, games, and now an A24 film that risks crystallizing one interpretation over many.

The question hanging over the fandom right now is whether a polished studio film can honor a mythology that was always defined by its refusal to be fully defined. If you have been a part of the ‘Backrooms’ community since the early wiki days, does seeing Kane Parsons’ vision on a cinema screen feel like the lore finally arriving somewhere, or like it has lost the very thing that made it feel so impossibly real?