Steam

Backrooms Lost Unit

Also known as Backrooms Lost Unit, backrooms lost unit, backrooms-lost-unit

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

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Last update

23 Jun 2026

Original sources

Latest update

AnnouncementPublished 5d ago

v0.0.2Hotfix 0.0.2 #6

Fixes & Changes Added 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 ses…

6 changesFixGameplay

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Latest updates

Update history

Browse past updates and patch notes for this game.

19updates

June 2026
Hotfix 0.0.2 #5Fix & Changes: Hello everyone! I’m bringing another small patch that fixes a couple of issues. I’m also actively working on new levels and content for the game, and I look forward to sharing more updates soon. Thank you…Announcementv0.0.26 changesFixGameplay10d ago
Voice Chat Is BackVoice 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.Announcement1 changeUI/audio14d ago
Hotfix 0.0.2 #3Fixed an issue where Steam invites would not work properly in lobbies.Announcementv0.0.21 changeFix17d ago
The Hub Enter the Hub, a safe zone recently discovered by MEG and BIF researchers. The Hub allows you to access any levels you have previously unlocked. Outpost The recently built outpost where researchers are actively…8 changesFixPerformancePatch notes17d ago
Hotfix 0.0.2 #2Fix & Changes: Fixed an issue where the Ceiling Spider would hide the bodies of players who were not jumpscared by it. Improved performance across several levels. Fixed an issue where the spectator mode arrows would fai…Announcementv0.0.24 changesFixPerformance20d ago
Hotfix 0.0.2Hello everyone! Today I'm releasing Patch 0.0.2 with a number of fixes and improvements to the game. Thank you to everyone who has provided feedback so far. It helps a lot and allows me to continue improving the experie…Announcementv0.0.28 changesFixPerformance24d ago
Dev Tip - Tired of constantly dying in the Metro Station due to the Rattlers??Announcement25d ago
Hotfix 0.0.1 #10Fix & Changes: Fixed a potential inventory crash issue. Fixed an issue where, in Spectator Mode, a dead player could alter the audio settings of the player being spectated. Removed debug clocks from the Void Level that…Announcementv0.0.13 changesFixPerformance26d ago
May 2026
Hotfix 0.0.1 #9Fix & Changes: Added a missing interaction outline to the generator cables in the Basement level. Gremlin entities can no longer kill players through walls or other objects. Fixed an issue where the mouse cursor would d…Announcementv0.0.15 changesFixGameplay27d ago
Fix & Changes: Removed the cars from the Parking Level and replaced them with lockers, as the cars were causing instability and various bugs. Fixed an issue with Spectator Mode. Restored several missing textures. Fixed…v0.0.14 changesFixGameplayStore28d ago
Hotfix 0.0.1 #7Fix & Changes: Improved performance in some levels Fixed an issue where the host could start a game without selecting a level Added extra VHS tapes in the Resort level Fixed a potential crash issue in the Void level Add…Announcementv0.0.16 changesFixPerformance28 May 2026

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