The Lost Bunker Demo
| App ID | 5038870 |
| App Type | Demo |
| Developer | Osama M.S.A |
| Publisher | Osama M.S.A |
| Supported Systems | Windows |
| Technologies | BlenderGameEngine Engine |
| Last Changenumber | 38526661 |
| Last Record Update | 2 September 2026 – 02:14:19 UTC ( |
| Release Date | 19 August 2026 – 19:27:52 UTC ( |
| Parent App | The Lost Bunker (4256080) |
Is a psychological horror game set in the 1980s, centered around a cursed cemetery and a hidden underground bunker. A night of routine guarding turns into a descent into fear, where screams, secrets, and dark rituals blur the line between friend and enemy.
Play on Steam
Additional Information
This demo is excluded from Steam Family Sharing because: This content type cannot be shared
| Developer | Osama M.S.A | |||||||||||
| controller_support | full | |||||||||||
| ReleaseState | released | |||||||||||
| Publisher | Osama M.S.A | |||||||||||
| Exclude from family sharing (exfgls) | 6 (This content type cannot be shared) | |||||||||||
| Store Release Date | 19 August 2026 – 19:27:52 UTC ( |
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| osarch | 64 | |||||||||||
| Social Media | https://discord.gg/NKPvRvhg2q https://www.instagram.com/osama_m.s.a/ https://www.youtube.com/@Osama_M.S.A |
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| Primary Genre | Adventure (25) | |||||||||||
| Store Genres | Action (1), Adventure (25) | |||||||||||
| Steam Release Date | 19 August 2026 – 19:27:52 UTC ( |
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| Store Asset Modification Time | 3 August 2026 – 23:15:06 UTC ( |
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| library_assets |
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| osextended | empty string | |||||||||||
| Is free on the store? | Yes | |||||||||||
| Detected Technologies | BlenderGameEngine Engine, Ogg SDK, OpenAL SDK, Opus SDK, Python SDK, SDL SDK, Vorbis SDK | |||||||||||
| controllertagwizard | Yes | |||||||||||
| First seen on SteamDB | 30 July 2026 – 21:36:03 UTC ( |
Supported Languages
| 18 Languages | Interface | Full Audio | Subtitles |
|---|---|---|---|
| English | Yes | Yes | Yes |
| French | Yes | Yes | |
| Italian | Yes | Yes | |
| German | Yes | Yes | |
| Spanish - Spain | Yes | Yes | |
| Arabic | Yes | Yes | |
| Indonesian | Yes | Yes | |
| Turkish | Yes | Yes | |
| Vietnamese | Yes | Yes | |
| Japanese | Yes | Yes | |
| Korean | Yes | Yes | |
| Polish | Yes | Yes | |
| Portuguese - Brazil | Yes | Yes | |
| Russian | Yes | Yes | |
| Simplified Chinese | Yes | Yes | |
| Swedish | Yes | Yes | |
| Thai | Yes | Yes | |
| Ukrainian | Yes | Yes |
Assets
Load all asset images
| trailer_name | The Lost Bunker Trailer |
| trailer_category | 3 |
| microtrailer ↴ | |
| video/webm | 5038870/1786183563/497ee7240d79aae503fb5771a231d8acefa8881b/1785590796/microtrailer.webm |
| video/mp4 | 5038870/1786183563/497ee7240d79aae503fb5771a231d8acefa8881b/1785590796/microtrailer.mp4 |
| adaptive_trailers ↴ | |
| dash_av1 | 5038870/1786183563/497ee7240d79aae503fb5771a231d8acefa8881b/1785590796/dash_av1.mpd |
| dash_h264 | 5038870/1786183563/497ee7240d79aae503fb5771a231d8acefa8881b/1785590796/dash_h264.mpd |
| hls_h264 | 5038870/1786183563/497ee7240d79aae503fb5771a231d8acefa8881b/1785590796/hls_264_master.m3u8 |
| screenshot_medium | 257389905/797a65182b82684b93f601e4ab3597fe4f59b2be/movie_600x337.jpg |
| screenshot_full | 257389905/797a65182b82684b93f601e4ab3597fe4f59b2be/movie_full.jpg |
| all_ages | false |
| is_highlight | true |
| timestamp | 13 August 2026 – 02:55:44 UTC |
