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Level 521 is the 522nd level of the Backrooms

Survival Difficulty: Class 0 (could be 0.5)

Safe

Secure

Devoid of Entities (?)

Description

The revolving door in Level 521, during The Flip. Photo from April 17 2021 at 13:45:22

Level 521 consists of 2 rooms (known as 521-A and 521-B, or The Day and The Night), each 12 meters wide, separated by a wall (that's seemingly impossible to break) and a glass revolving door with a wooden frame. When entering this room, you have a 90% chance of entering 521-A, and a 10% chance of entering 521-B

521-A / The Day

521-A is roughly 800 miles long and is completely lit, despite there being no visible light source. It appears to be completely empty, besides some wooden tables that show up every mile or two, A few of these tables have text written on them in black, and by no-clipping under one of these tables, you can enter the level corresponding to the text written on the table. As of now, 5 of these tables have been discovered. It's speculated that you may be able to access any level in the Backrooms by writing its name on one of the wooden tables and no-clipping under it (making it somewhat similar to the Debug Room). However, it's unknown if this actually works.

521-B / The Night

521-B is estimated to be anywhere from 1500 to 4000 miles. No-one has explored the room for more than a few hours, so its length is unclear. 521-B is significantly darker than 521-A, with only a tiny amount of light coming from the windows on the wall opposite the door, each about 50 meters apart. These windows can easily be broken using the tables from 521-A, and jumping through them lets you enter Level 188 (99% chance) or Level 1204 (1% chance)

Entities

Level 521 doesn't usually contain any entities (as far as we're aware), but there's supposedly a window in 521-B with confetti coming out of it that serves as a portal to and from Level Fun. This means, there could be Partygoers roaming around 521-B. If this window does exist and you happen to find it, STAY AS FAR AWAY FROM IT AS POSSIBLE.

The Flip

The Flip occurs every ~2 hours, for 5-10 minutes. During The Flip, the revolving door becomes usable, allowing for travel between 521-A and 521-B. The only indication that The Flip has started is the appearance of a faint buzzing noise, similar to the one heard in Level 0.

521-Ω

521-Ω is a supposed section of Level 521 that's behind the wall opposite the door in 521-A. Supposedly, it's like a combination of 521-A and 521-B being moderately lit and containing both tables and windows. However, there is currently no proof of its existence.

Colonies and Outposts

As of now, no colonies or outposts have been spotted in Level 521, but the level could contain them. Granted, they'd need to bring supplies from other levels.

Entrances and Exits

Entrances

Go through the trapdoor at the end of the ladder found in Level 520.

Exits

Run for 1 hour to enter Level 522.

No-clip under a table with text on it in 521-A to enter Level !, Level 3, Level 777, Level 9223372036854775807 or Level Z (and possibly more via tables we don't yet know about).

Jump out of one of the windows in 521-B to enter Level 188 (99% chance) or Level 1204 (1% chance).

(unconfirmed) Find a window with confetti coming out of it and go through to enter Level Fun (IF IT EXISTS, DON'T ENTER THAT WINDOW).

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