One anonymous 4chan post about a moving statue spawned 10,400 fictional monsters
In June 2007 someone posted a mock classified report to 4chan's paranormal board about a concrete statue that moves only when nobody is looking. Readers copied the format, and the SCP Foundation was born: a shared horror universe that by 2026 documented more than 10,400 anomalies and may be the largest collaborative writing project ever.
The premise is a secret organisation that answers to no government, only to a shadowy body called the O5 Council. Its agents track down things that break the laws of science, from creatures and objects to places and abstract ideas, and lock them away while hiding their existence to keep ordinary life running. Witnesses get amnesia-inducing drugs; dangerous experiments fall to D-class personnel, expendable test subjects usually drawn from prisons. Rival factions add conflict, such as the Chaos Insurgency, made up of defectors who weaponise anomalies, and the Serpent's Hand, which campaigns for anomalous beings' rights.
Most entries are written as dry scientific files. Each anomaly gets a number and a containment class, followed by procedures, a description and addenda, with black redaction bars and data expunged notes hinting at secrets above the reader's clearance. That deadpan, academic voice is widely credited for making the horror land. The first entry, SCP-173, is the statue; later favourites include SCP-096, which hunts anyone who sees its face, SCP-055, an anti-meme that makes observers forget it, and SCP-3008, an endless IKEA staffed by faceless employees who turn hostile when the lights go out. Not all are grim: SCP-999 is a friendly slime that smells of whatever comforts you most.
The author of SCP-173, later identified as Wesley Williams, illustrated it with a photo of a sculpture by Japanese artist Izumi Kato, who permitted only non-commercial use; the image was later removed over copyright. In July 2008 the wiki moved to Wikidot and so, almost by accident, adopted a Creative Commons licence. A clean-up from September to December 2009 reviewed every article and cut many weak ones.
Growth came in waves, notably in 2012 after the game SCP - Containment Breach appeared. Licensing arguments later caused a 2017 dispute that briefly shut the Russian branch. The wiki also holds over 6,300 short stories, and with no central canon, writers build their own linked clusters.
Source: SCP Foundation