Steam
后室迷失之境Backrooms：The Lost
Also known as backrooms lost, backrooms-the-lost, bl
A [Puzzle game] + [escape room] backrooms game; You are FBI agent Tommy. Unfortunately, he fell into the back room during a disappearance case. Random mazes, physical dangers, and the pressure of liminal spaces, Can you escape safely?
Last update
11 Jun 2026
Original sources
1
Latest update
Latest updates
Update history
Browse past updates and patch notes for this game.
- December 2025
- Christmas from the Backrooms + Game Expo Recap Last WeekDear fellow Backrooms dwellers, Tonight is Christmas Eve, and tomorrow is Christmas Day. Wishing all of you a Merry Christmas! I also want to share some recent updates with you all. Last Saturday, we headed to Shenzhen…
- November 2025
- [ Thank you ] Our wishlist now is 6000+Hi Backrooms roomates, Many thanks for your support, we ALL Very touched and thank you for your support. It courage us must do the game better and better. Thank you, my backrooms roomates, thank you my friends. Hope you…
- October 2025
- [Breaking News] Backrooms: The Lost Demo is officially live today!!!Dear Backrooms roomates: Happy Halloween! We’re thrilled to announce that [Backrooms: The Lost] Demo is officially LIVE~ Have fun, stay alert, and don’t let the hum drive you crazy. You can send the email tell us any su…
- [Backrooms:The Lost ] Level 1 and new entity "Mr. Loney"[Backrooms:The Lost ] Level 1 and new entity "Mr. Loney" Thank you to add wishlist to support us : )
- September 2025
- [Breaking] Brand-New Level 1 Revealed for the First Time!Hello, Backrooms roommates—it’s been a while! Today we’d like to share with you the latest Level 1 design for Backrooms: The Lost (This is the Fandom-version prototype.) All screenshots below are captured from in-game f…
- August 2025
- To all wanderers on the edge of reality— The very first gameplay PV for Backrooms: The Lost is finally here! Yes, we’ve brought those yellow corridors from your nightmares, the flickering lights, and the cavernous wareh…Patch notes
- May 2025
- Major Update and New Puzzles in Backrooms:The LostDear players, We are thrilled to announce that Backrooms:The Lost has undergone a significant update to its scenes and gameplay! This update brings a complete overhaul of the game's environments, from eerie corridors to…
- April 2025
- Backrooms: The Lost Shines at 2025 BGM Exhibition, Receives Rave ReviewsDear Players, We are thrilled to announce that the Backrooms: The Lost team participated in the highly anticipated 2025 BGM Exhibition! This event provided us with an incredible opportunity to connect with players face-…
- March 2025
- Backrooms:The Lost——Level 0 Update AnnouncementWe're thrilled to announce that Level 0 in Backrooms: The Lost has been significantly updated! This update brings four all - new scenes, each filled with mystery and danger. These scenes aren't just visual upgrades but…
- January 2025
- oiiaoooiia cat come to vist the backrooms??
- The MISSING PEOPLE
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