Screenshots
Watch trailer on Steam ↗Lost In The Backrooms: Day 100
Rough devs · Published by Rough devs
Mostly Positive — 73% positive (15 reviews) · 21 achievements
Last updated 28 Sept 2026
Lost in the backrooms day 100 is a co-op horror game based on the concept of the backrooms with different levels and entities , a sanity system and unreal engine 5 graphics for the best immersive experience.
£6.69
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Action, Adventure, Indie · 2026 · More £5 - £15 games
Navigate through endless corridors and face unseen horrors in Lost In The Backrooms: Day 100. Developed by Rough devs, this intense indie adventure challenges your wits and nerve with each step.
About this game
They say there's a chance to escape the backrooms in the 100th day. Will you succeed?
Navigate terrifying levels with numerous dangers and entities lurking around every corner. Watch out for your sanity as you explore the strangest levels.
More than 15 levels with different ways to escape, different dangers and different environments.
7 entities with different behaviors , abilities and appearance. All of them are accurate to the wiki and you always have to use different strategies to go forward.
Play alone or in a total of 6 players Co-op, Explore the backrooms but at the same time be careful of the dangers.
Developed with Unreal Engine 5 guarantees beautiful graphics with stunning environments and scenarios.
The liminal mode is a walking simulator gamemode for the people that want vhs liminal vibes, no monsters but just unsettling liminal spaces.
Use proximity chat to talk to your friends and fully immerse yourself in the experience.
In this gamemode one of your group of friends will be selected as a monster
The monster will have to kill evereyone in the time limit while
the surivors will have to survive for 7 minutes
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 11
- Processor: Intel core i5 10th gen
- Memory: 16 GB RAM
- Graphics: GTX 1050 ti
- DirectX: Version 12
- Storage: 5 GB available space
- Sound Card: Any
- Additional Notes: Low graphics at 30-60fps (( The game wasn't tested on many devices))
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 11
- Processor: Intel core i7 12700
- Memory: 16 GB RAM
- Graphics: RTX 3060
- DirectX: Version 12
- Storage: 5 GB available space
- Sound Card: Any
- Additional Notes: Ultra at 60+fps ( The game wasn't tested on many devices)
Supported Languages
Latest news
Patch NotesOfficial
Patch 1.0.3
Fixes of today:NEW VHS filter in liminal modeFixed other backgrounds still not working in liminal and multiplayer (now it should work just fine)Fixed hide and seek mode not working correctlyFixed ending counter and endings and achievement not working correctlyFixed spawns in level walk and runMade UI more intuitiveRead full article on Community Announcements (Rough_Devs)Patch NotesOfficial
Patch 1.0.2
The feedback is helping us improve the game, here is what we have done : Added more hints to help players complete the levelsAdded description of normal and liminal mode Added ending counterFixed some backgrounds that were missingFixed falling animationThanks for the amazing support since release , hope that everyone can enjoy Lost in the backrooms: Day 100. SPECIAL THANKS TO :H2ODeliriousVanossGaming DaithiDeNogla BasicallyIDoWrk PastaroniRavioliGaming KingLuiCalibre (loved the video)Read full article on Community Announcements (Rough_Devs)Patch NotesOfficial
Hotfix 9# (Caseoh's Feedback)
Improved things using Caseoh's feedback in his gameplay:Added sensitivity sliderAdded arrows and stains to help players escape level 0Made level 1 brighterThanks for the support and the feedback in these days.Special thanks for Caseoh, i really hope you'll play it again.Read full article on Community Announcements (Rough_Devs)AnnouncementsOfficial
Game release
This will be the last update of the game so to make the game more enjoyable we made it easier to find the vent in level 1 (because many people couldn't advance because of it)We also added Parallax occlusion mapping in some materials like the rocks of level 11.We've decided to stop working on Lost in the Backrooms Day 100.It’s not something we wanted to do, but honestly we just don’t feel like continuing this project anymore. We’ve spent a lot of time on it and tried to improve it as much as we could, but at this point it makes more sense for us to move on.We want to say thank you to everybody that played it or gave feedback. It meant more than you think and helped me a lot while developing it.Maybe we’ll come back with another game, I don’t know yet. For now though, this is it for this project.Take care, and thanks again.Read full article on Community Announcements (Rough_Devs)Patch NotesOfficial
UPDATE 5.0
Early access 5.0After a lot of time not talking about the game we FINALLY finished this update and there is a lot to say.IMPROVEMENTS AND NEW ADDITIONS:Improved main menu Reworked options menu(DLSS, FSR , NEW audio settings...)NEW VHS mode and motion blur toggleImproved proximity voice chat Character selection(2 new playermodels)NEW introNEW level selection with the HubNEW animationsa LOT of general and game breaking bug fixes NEW level and NEW endingLevel fun , 11 retextureNEW skinstealerHide and seek rebalancing and new level Level 0 NEW lighting Improved movemenet , spine rotationAdded whistelingHomer ritual in Hide and seek mode press 7 to domer forgot other fixes NEW demoRead full article on Community Announcements (Rough_Devs)
