Released May 21, 2026 Early Access $5.38 · −23% Very Positive Counts toward your Steam games

Backrooms Lost Unit

By JD Archives

Exploration First-Person 3D Horror Psychological Horror Action Casual Realistic LootCraftingCinematicSurvival Horror

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Reviews 55 Very Positive

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Backrooms Lost Unit is a game tagged Exploration, First-Person and 3D by JD Archives, released May 21, 2026. It has 55 Steam reviews (Very Positive). The Steam games most like it include Survive The Backrooms!, Backrooms: Collision Not Found and Backrooms: Escape Together.

Find yourself lost in the Backrooms in this co-op journey for 1 to 4 players. Explore eerie levels, solve puzzles, and find your way out using scavenged items. Entities lurk everywhere, and the deeper you go, the deadlier it gets.

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<a href="https://launchrivals.com/games/4279040-backrooms-lost-unit"><img src="https://launchrivals.com/games/4279040/badge.png" alt="Backrooms Lost Unit launch date" width="320" height="84"></a>

<a href="https://launchrivals.com/games/4279040-backrooms-lost-unit"><img src="https://launchrivals.com/games/4279040/badge.png?theme=light" alt="Backrooms Lost Unit launch date" width="320" height="84"></a>

Survive The Backrooms! 89% match · Exploration, First-Person, 3D
Backrooms: Collision Not Found 83% match · Exploration, First-Person, 3D
Backrooms: Escape Together 83% match · Exploration, First-Person, 3D
Backrooms: No Escape 81% match · Exploration, First-Person, 3D
Escape the Backrooms 81% match · Exploration, First-Person, 3D
Backrooms 99 81% match · Exploration, First-Person, 3D
BackRooms X 80% match · Exploration, First-Person, 3D
Backrooms Anomaly Project 79% match · Exploration, First-Person, 3D
Backrooms: Hide Together 79% match · Exploration, First-Person, 3D
Backrooms 79% match · Exploration, First-Person, 3D

Steam data

Everything Steam lists for Backrooms Lost Unit · record updated 1 hour ago

Steam store

Overview

App ID4279040

Release dateMay 21, 2026

Last change number40238051

Last record update1 hour ago

App type: Game
Developer: JD Archives
Publisher: JD Archives
Steam profile: Counts toward game count and achievement totals · checked 1 day ago

Windows

Single-playerMulti-playerCo-opOnline co-opSteam AchievementsFamily Sharing

Prices

Price · US$6.99

On sale0 of 41regions right now

Lowest seen · US$6.99Oct 23, 2026

Checked8 hours agoin 41 regions

Japan¥JPY

Every price change is kept from Oct 23, 2026 on. Pick a region below to compare.

Patches

Oct 5, 2026 Hotfix 0.0.3V8
Fixes & ChangesFixed an issue where VHS tapes were not spawning in the correct locations in the Resort level.Decreased the intensity of the camera bob effect.Fixed an issue with the spectator system where, if the player being spectated die…
Sep 23, 2026 Hotfix 0.0.3v7
Fixes & ChangesFixed missing audio cues and footsteps.Increased interact text size by 20%.Fixed an issue in the Void level where anomalies fixed by clients would not count as completed.Fixed several areas where players could get stuck.If y…
Aug 26, 2026 Hotfix 0.0.3v6.1
Fixed an issue where you could not interact with generators or other interactable objects.
Aug 26, 2026 Hotfix 0.0.3v6
Change & Fixes:Fixed an issue in the Basement level where players could add another tape to the cable after it had already been repaired.Fixed an issue where jumping could cause players to see through walls if you were to close to it.Fixed…
Aug 23, 2026 Hotfix 0.0.3 #5
Hello everyone! Today I’m releasing another regular update with some fixes, improvements, and new features for the game.I really appreciate everyone who has been playing and taking the time to share your feedback. It helps me improve the g…
Aug 11, 2026 Hotfix 0.0.3 #4
Change & Fixes:Fixed an issue where doors would not close when Shape Shifter Skin Stealers interacted with them.Fixed an issue where closets would sometimes fail to protect players from entities.Removed the Smiler section from the Basement…
Aug 7, 2026 Hotfix 0.0.3 #3
Change & Fixes:Fixed an issue at the end of the Resort level.Decreased sanity drain in the Metro Station level.Added extra loot to the Abandoned Office level.Improved performance across multiple levels through Lumen optimization.Fixed seve…
Jul 17, 2026 Hotfix 0.0.3 #2
Change & Fixes:Fixed an issue where the camera bob reduction setting was not working.Added a new camera bob effect.Improved FPS performance in Level 0.Fixed an issue where the Clump entity could become stuck in certain areas.
Jul 9, 2026 Hotfix 0.0.3 #1
Change & Fixes:Decreased the fisheye effect in VHS mode. Slightly improved FPS in several levels.Improved network stability, reducing rubberbanding and lag.I am actively working on tracking down and fixing crashes. If you experience a cras…
Jun 27, 2026 Hotfix 0.0.2 #8
Fixes & Changes:Increased falloff distance for proximity chat.Improved FPS performance in the Abandoned Office and Resort levels.Fixed a potential crashed.Fixed an issue where consuming Potato Chips would sometimes not restore sanity.I am …
Jun 25, 2026 Hotfix 0.0.2 #7
Fixes & Changes:- Fixed an issue where players joining an existing lobby couldn't swim.- Added extra loot across several levels.- Greatly reduced camera shake while in spectator mode.- Improved performance in the Hub.I am actively working …
Jun 22, 2026 Hotfix 0.0.2 #6
Fixes & ChangesAdded missing collisions in level 0.Fixed an issue in the Metro Station where a checkpoint could occasionally send players to the wrong location.Fixed keypads not working for clients in multiplayer sessions.Fixed an issue wh…

Build	Branch	Updated
26205320	public	Oct 25, 2026
26011797	public	Oct 17, 2026

Depots

ID	Name	Systems	Size	Download	Manifest
228989	— shared from 228980	Windows	—	—	—
228990	— shared from 228980	Windows	—	—	—
4279041	—	Windows	9.44 GB	9.07 GB	8179368042296280776

Branch	Build	Updated	Access
public	26205320	Oct 25, 2026	Open

Configuration

Install foldersteamapps/common/BackroomsLostUnitContent

Executable	Arguments	Systems	Description
BackroomsProject.exe		All

Space per player100 B

Filesup to 1,000

Save locations1

Root	Path	Pattern	Systems
WinAppDataLocal	Backrooms Lost Unit/Saved/SaveGames	*.sav	All

Update history

Oct 26, 2026 · 19:04 #40238051
- depots.4279041.manifests.public.download ~~9313449888~~ → 9734819696
- depots.4279041.manifests.public.gid ~~3580515459638698306~~ → 8179368042296280776
- depots.4279041.manifests.public.size ~~9700833811~~ → 10140399914
- depots.branches.public.buildid ~~26011797~~ → 26205320
- depots.branches.public.timebuildupdated ~~1792252614~~ → 1792970920
- depots.branches.public.timeupdated ~~1792252643~~ → 1792971047

News

Sep 30, 2026 · Community Announcements Backrooms Lost Unit — Upcoming Levels Playtest
Want to be part of the private testing for the upcoming Backrooms Lost Unit update?You'll have the opportunity to test some of the new levels and actively communicate with the developer to report bug…
Aug 2, 2026 · Community Announcements Road Map
Road MapI'm happy to announce that four new levels are currently in development for the next major update, along with improvements and overhauls to several existing levels. Please keep in mind that e…
Jul 3, 2026 · Community Announcements New Level Out NOW
DARK POOLSA unit of B.I.F. agents has recently discovered a new sublevel hidden beneath the Poolrooms. This strange liminal area is both beautiful and unsettling, with flooded corridors that seem to …
Jun 13, 2026 · Community Announcements Voice Chat Is Back
Voice chat is back after fixing the crashing issues! If your voice chat controls aren't working, make sure you've set up keybinds for both Push to Talk and Mic Always On.

Data from public Steam pages, updated daily; 5 days of history. LaunchRivals is not affiliated with Valve or Steam.

Backrooms Lost Unit

About Backrooms Lost Unit

Steam data

Overview

App info

Platforms

Features

Prices

Japan¥JPY

Americas 10

Europe 5

CIS 4

Asia-Pacific 15

Middle East & Africa 7

Patches

Patch notes

Builds

Depots

Depots

Branches

Configuration

Launch options

Cloud saves

Update history

Changes to the Steam record

News