The Neon God

Item #: SCP-4000

Object Class: Keter

Special Containment Procedures: Media outlets located in cities with a population over 10 million are to be monitored for mentions of SCP-4000. Should it be confirmed that a person was able to enter and then exit SCP-4000, they are to be interviewed and then released.

Foundation overlooked surveillance cameras are to be placed and operated in spots of high SCP-4000 activity, including subway tunnels, slums, and alleyways, within these cities.

Due to the limited amount of information regarding SCP-4000, whenever possible, MTF-Theta-1 (“Neon Blazers”) are to be sent into SCP-4000-1. During this missions, visual contact of SCP-4000-1 is to be maintained throughout the entirety of the exploration.

Drone incursions into SCP-4000 are discouraged due to the high risk of destruction and subsequent loss of all information gathered by the drone.

Description: SCP-4000-1 refers to any number of doors which randomly form in cities with a population over 10 million. While the exact criteria of SCP-4000-1 formation is unknown, so-far they have been limited to areas of the city which see significantly less traffic than other areas, usually subway tunnels, abandoned buildings or alleyways1. Additionally, no known instances of SCP-4000-1 have formed if the area specified is being directly monitored by any source.

Entering any SCP-4000-1 instance transports the individual into SCP-4000. SCP-4000 itself is an alternate dimension containing a supermassive man-made environment resembling underground portions of common cities. While evidence of human habitation has been discovered, it is unknown who or what constructed SCP-4000. The SCP-4000-1 instance used to enter SCP-4000 will remain active on the interior of SCP-4000. However, exiting after a certain amount of time often results in the individual exiting from a different SCP-4000-1 instance in a different are or city than the one they entered through.

While the entrance points to SCP-4000 are completely random, the interior of SCP-4000 remains consistent in its layout. However, due to its size and winding nature, it is near impossible to encounter the same stretch of passageway twice. Currently, over 3,000 km of unique passageway has been explored.

The only living creature found naturally living within SCP-4000 are spiders. Throughout almost every single portion of SCP-4000 explored, spiders have been discovered living within the rooms and passageways. Occasionally, large swathes of cobwebs have been discovered blocking out entire passageways. It is unknown how they acquire sustenance, as no form of food has been discovered.



Small exploration Team Sent in first time. Short and brief exploration.

Exploration team sent in again. Encounter with unknown thing traveling very fast (the Owl) as they are climbing up. Evidence of some sort of cult is found, as well as evidence that this thing is very old. Come out in a subway. An area appears as if it was used by someone. Investigation of it reveals written materials in a different language. Team heads back.

Exploration team sent in again. Determined to go as far as possible. Further evidence of the cult is found. The Neon God name drop hopefully. Sent with radio booster things which also act as a 'string.' Boosters eaten by spiders, team lost.


Documents recovered by the previous team.


Team's comm equipment found by someone else. Foundation recovers it. Team is slowly lost and pursued by something. Eventually one MTF member makes their way to the very top of a building. They look from it and see endless skyscrapers stretching far past their sight. A single one towers above every single other one.

Drone recovered. It's just skipping footage of the drone continuing onwards past the city skyline then cutting out then resuming. Over and over for hours. Then it just cuts out.

The next time the Foundation finds an entrance, the MTF's body is on display directly in front of the entrance. Carbon dating indicates it is incredibly old.


Something something 'more recently, previously existing entrance ways have been spontaneously and temporarily converted to SCP-4000-1 instances.'

What wonderful gods you have…

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