Steam game

Lost In The Backrooms: Day 100

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.

$7.19 May 26, 2026

By Rough devs

Windows
View on Steam
Lost In The Backrooms: Day 100 - Rough devs. Popular. Released May 26, 2026
Screenshot of Lost In The Backrooms: Day 100 gameplay showing in-action mechanics Screenshot 2 of Lost In The Backrooms: Day 100 - additional gameplay view Screenshot 3 of Lost In The Backrooms: Day 100 - more gameplay footage Screenshot 4 of Lost In The Backrooms: Day 100 - final gameplay screenshot

Overview

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

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