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Sleepless

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App ID 1798570
App Type Game
Developer ,
Publisher Mental Studios
Supported Systems Windows
Last Changenumber 29379949
Last Record Update 4 June 2025 – 20:01:00 UTC ()
Release Date Coming soon

Inspired by "The Russian Sleep Experiment," this co-op multiplayer horror game challenges players to collect crucial evidence from past experiments. Work together to control the gas, evade the roaming monster, and uncover the terrifying truth.

There is only partial information available about this app as SteamDB is missing the access token.

Additional Information

This game is excluded from Steam Family Sharing because: This game has not yet been released

ReleaseState prerelease
Exclude from family sharing (exfgls) 8 (This game has not yet been released)
Store Release Date Coming soon
osarch 64
community_hub_visible Yes
Social Media https://discord.gg/uhdq9JX2
Primary Genre Indie (23)
Store Genres Action (1), Adventure (25), Indie (23)
Store Asset Modification Time 17 May 2025 – 09:48:02 UTC () (1747475282)
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height_pct42.400854903823316
osextended empty string
controllertagwizard Yes
First seen on SteamDB 21 October 2021 – 14:28:47 UTC (), in changelist #12911418

Supported Languages

6 Languages Interface Full Audio Subtitles
English Yes
French Yes
German Yes
Spanish - Spain Yes
Danish Yes
Russian Yes

Tags

🕴 Psychological Horror 😱 Horror 🎒 Survival Horror 🌲 Survival 🔪 Thriller 🕹️ Multiplayer 👥 Online Co-Op 💥 Action 🌱 Realistic 🧊 3D 🗺️ Adventure 🌄 Action-Adventure 🗺 Exploration 🔍 Hidden Object 🙌 First-Person 🪂 World War II 🔍 Investigation 📖 Lore-Rich 📜 Historical ☢️ Cold War

Categories

Single-player Online Co-op Steam Achievements Family Sharing Profile Features Limited Multi-player Co-op

Assets

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Assets
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timestamp17 May 2025 – 09:48:16 UTC
Trailers
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