Lost in the Backrooms: Day 100

Main game

Released May 26, 2026

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Community notes

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.

Genres: Adventure Indie
Platforms: PC (Microsoft Windows)
Themes: Action Horror
Game modes: Co-operative Multiplayer Single player
Perspectives: First person
Keywords: accessibility options adjustable difficulty camera comfort custom volume controls playable without timed input steam achievements
Languages: English · Interface, Subtitles

Complete release history (2)

PC (Microsoft Windows) · Oct 30, 2025
Worldwide · Exact date · Early access · IGDB
PC (Microsoft Windows) · May 26, 2026
Worldwide · Exact date · Full release · IGDB