Lost In The Backrooms: Day 100
| App ID | 3964500 |
| App Type | Game |
| Developer | Rough devs |
| Publisher | Rough devs |
| Supported Systems | Windows |
| Last Changenumber | 32030011 |
| Last Record Update | 1 November 2025 – 18:36:05 UTC ( |
| Release Date | 30 October 2025 – 18:01:17 UTC ( |
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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.
Additional Information
| Developer | Rough devs | |||||||||||||||||||
| community_visible_stats | Yes | |||||||||||||||||||
| ReleaseState | released | |||||||||||||||||||
| Publisher | Rough devs | |||||||||||||||||||
| Store Release Date | 30 October 2025 – 18:01:17 UTC ( |
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| osarch | 64 | |||||||||||||||||||
| community_hub_visible | Yes | |||||||||||||||||||
| Social Media | https://discord.gg/CdgtcwcxWe https://www.tiktok.com/@rough_devs https://www.youtube.com/@Rough_Devs |
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| Primary Genre | Indie (23) | |||||||||||||||||||
| Store Genres | Action (1), Adventure (25), Indie (23), Early Access (70) | |||||||||||||||||||
| Store Asset Modification Time | 1 October 2025 – 13:18:35 UTC ( |
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| library_assets |
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| osextended | empty string | |||||||||||||||||||
| deckresolutionoverride | Default | |||||||||||||||||||
| controllertagwizard | Yes | |||||||||||||||||||
| Early Access Release Date | 30 October 2025 – 00:00:00 UTC ( |
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| First seen on SteamDB | 17 August 2025 – 13:42:30 UTC ( |
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Supported Languages
| 1 Languages | Interface | Full Audio | Subtitles |
|---|---|---|---|
| English | Yes | Yes |
Tags
Categories
Single-player
Online Co-op
Steam Achievements
Family Sharing
Early Access
Steam is learning
Multi-player
Co-op
Accessibility Categories
Assets
Load all asset images
| trailer_name | Lost in the backrooms: Day 100 Trailer |
| trailer_category | 3 |
| trailer_480p ↴ | |
| video/webm | 257191655/movie480_vp9.webm |
| video/mp4 | 257191655/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 257191655/movie_max_vp9.webm |
| video/mp4 | 257191655/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 3964500/285816340/54c4c8f596325efd31190defb6cba8491fe28af4/1756723112/microtrailer.webm |
| video/mp4 | 3964500/285816340/54c4c8f596325efd31190defb6cba8491fe28af4/1756723112/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 3964500/285816340/54c4c8f596325efd31190defb6cba8491fe28af4/1756723112/dash_av1.mpd |
| dash_h264 | 3964500/285816340/54c4c8f596325efd31190defb6cba8491fe28af4/1756723112/dash_h264.mpd |
| hls_h264 | 3964500/285816340/54c4c8f596325efd31190defb6cba8491fe28af4/1756723112/hls_264_master.m3u8 |
| screenshot_medium | 257191655/17e4009729aababa954a1c619cfd61ba1032f070/movie_600x337.jpg |
| screenshot_full | 257191655/17e4009729aababa954a1c619cfd61ba1032f070/movie_full.jpg |
| all_ages | true |
| is_highlight | true |
| timestamp | 10 September 2025 – 11:17:21 UTC |
Depots
| ID | Configuration | Size | DL. |
|---|---|---|---|
| 228989 | Windows Shared InstallDepot from 228980VC 2022 Redist | No size | |
| 228990 | Windows Shared InstallDepot from 228980DirectX Jun 2010 Redist | No size | |
| 229007 | Windows Shared InstallDepot from 228980.NET 4.8 Redist | No size | |
| 229020 | Windows Shared InstallDepot from 228980OpenAL 2.0.7.0 Redist | No size | |
| 229030 | Windows Shared InstallDepot from 228980PhysX System Software 8.09.04 | No size | |
| 3964501 | 2.41 GiB | 2.12 GiB |
Total size on disk is 2.41 GiB and total download size is 2.12 GiB.
Branches
| Name | Description | Build ID | Time Updated |
|---|---|---|---|
| public | 20634986 |