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Demonsomnia

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Demonsomnia screenshot 1
Demonsomnia Trailer 7 trailerWatch trailer on Steam ↗

Demonsomnia

Serhat Akgul · Published by Demonsomnia Team · Official site ↗

Content notice: This game contains extremely scary elements and blood. Anyone under the age limit should not play. Anyone with certain illnesses should not play.

Mostly Negative — 35% positive (328 reviews) · 2 achievements

Last updated 27 Sept 2026

Demonsomnia is a CO-OP multiplayer bodycam horror game focused on the impact of nuclear reactions. Radiation has spread everywhere, so put on your gas mask. Your goal is to activate the nuclear reactor device and escape without being caught by mutants.

Early AccessDJCTQ 14Co-op

£10.46

Lowest price we've ever recorded

View on Steam

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Price history

3 Sept 2026Lowest: £10.46 · Highest: £10.469 Oct 2026

Action, Early Access · 2024 · More £5 - £15 games

Embark on a tense CO-OP horror adventure in Demonsomnia, where radiation and mutants await your team. Developed by Serhat Akgul, this 2024 early access game challenges you to survive and escape the nuclear fallout.

About this game

Demonsomnia is a CO-OP multiplayer bodycam horror game focused on the impact of nuclear reactions. Your goal is to activate the nuclear reactor device and escape without getting caught by mutants.

Demonsomnia offers 3 different game modes.


This mode is weapon-free and filled with intense suspense. Collect the necessary items inside the building without making any noise, and find a way to escape. The executioner inside can hear both in-game sounds and your real-life microphone sounds.


Grab a weapon, head to the forest, and collect the items needed to hunt the demon from the misty woods. The forest is filled with villagers and strange mutated creatures. Once you’ve hunted the demon, inject its fluid and add it to the nuclear device.


Your goal is to hunt the demon in the mansion at the center of this dark village. However, you have a problem: you have no weapons.

This CO-OP game, developed with Unreal Engine 5, offers the highest performance and graphics quality for multiplayer games!

  • Body Camera: You have a body camera. Use the radio to report to your friends when you encounter various entities—assuming they’re still alive.

    Equipment: Locate areas with high radiation; these areas contain useful items like radiation salt. You’ll use these items to hunt the demon. Many tools and devices are also available for your mission.

    Buy guns: Weapons such as pistols and machine guns will help you feel safe when you’re alone. Remember, sometimes they’re your only friends...

  • CO-OP: Play whenever you want with friends or other players.

    Teamwork: Work in harmony with your friends, cooperate with your team, and maybe even guide them. Everyone needs a leader from time to time; maybe you’re the leader they need.

The government has assigned 4 brave individuals to investigate the effects of nuclear reactions; you are one of those 4. Were these various entities created by radiation, mutated species, hallucinations, or unknown beings?

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10, 64 Bit
  • Processor: Intel Core i5-4430 / AMD FX-6300
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GTX 970 / AMD Radeon R9 390
  • DirectX: Version 11
  • Network: Broadband Internet connection
  • Storage: 20 GB available space

Recommended

Recommended:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10 - 64 bit
  • Processor: Intel Core i7-6700K or AMD Ryzen 5 2600X
  • Memory: 32 GB RAM
  • Graphics: NVIDIA RTX 2060 / AMD Radeon RX 5700
  • DirectX: Version 12
  • Network: Broadband Internet connection
  • Storage: 20 GB available space

Supported Languages

English, French, Italian, German, Spanish - Spain, Simplified Chinese, Japanese, Korean, Russian, Turkish, Ukrainian, Arabic

Latest news

  • AnnouncementsOfficial

    Rebuilding Demonsomnia: How Far Have We Come?

    Hello everyone! It’s been about three months since our last announcement. So, what's been happening during this time? We're excited to share that we've laid the foundation for the "New Version" of our game! Most of our weapons are now complete. The first map is 90% finished. Currently, we are intensively focusing on AI development. Also, as promised, we will continue to share in-game screenshots with each announcement. Note: These assets are exclusive to upcoming versions, not the current release. https://i.imgur.com/mBkssxF.png https://i.imgur.com/FO6VhnW.png A quick recap for those who missed previous announcements: Why are we rebuilding the game from scratch? Unfortunately, the current version did not meet our expectations, prompting us to completely rebuild the game from scratch. We're now steadily moving forward step-by-step. Our main motivation comes from the high number of wishlists we currently have. We’d like to remind you that we’ve intentionally held back from fully engaging with our wishlist audience, as we haven’t offered discounts exceeding 20%. (Steam notifications are only sent for discounts above 20%.) Stay tuned! WOZIVA
    Read full article on Community Announcements (Existence)
  • AnnouncementsOfficial

    Demonsomnia: A Fresh Start for 2025!

    Hello! With this approximately 2GB patch, we’ve fixed several bugs that were reported to us. Additionally, we’ve resolved the persistent network connection issue. But what about the more significant ones? The only way to address them is by rebuilding the game from the ground up and releasing a major update. We want to remind you once again that we are actively working on the complete overhaul of Demonsomnia and will continue to share previews of the new version whenever possible. We’ve received many justified criticisms and concerns from our players. However, despite all these valid criticisms, Demonsomnia still holds a remarkably high position on wishlists. This serves as a powerful reminder of the game’s untapped potential and remains a major source of motivation for our team. As we enter the new year, we eagerly look forward to showcasing this potential not only to ourselves but also to our loyal player base. We hope to make a significant mark in 2025 with major updates that will help create even more enjoyable moments, and we wish everyone a peaceful, healthy, and prosperous 2025. WOZIVA
    Read full article on Community Announcements (Rasteinov)
  • Patch NotesOfficial

    Our Plan and Patch Notes 1.4.4

    Patch Notes 1.4.4 Here is an image from our mode, which we haven’t released yet but plan to publish with a major update and marketing campaign once it’s perfected: https://i.imgur.com/b8JSIsM.png Our plan is to transform Armed Mode into an Extraction-style experience, where the demon exists on a massive and artistic scale outdoors, simple elements like the mansion will be removed, and all weapon and AI mechanisms will be of the highest quality. Also, our Discord Address: Demonsomnia Discord Address The following updates are included in the current minor update: - Fixed the issue with the beam of light coming from the cross while hunting the demon. - Added a health bar above the demon. - Ghost will now spawn in the correct room where the demon is located. This provides an additional clue for finding the correct room. - Fixed the non-functioning issue with Radiation Finder and Snake. - The previously deactivated "1" key for picking up items in Demon Mode is now functional.
    Read full article on Community Announcements (Existence)
  • AnnouncementsOfficial

    Demo Activation Announcement!

    When we last activated our demo, it became one of the most played demos in the world. Since the day we deactivated it, we have never made it available again. But, I think the time has come. As of now, our demo is ACTIVE. You can also play it online. Since the day we released our game, rather than letting negative comments discourage us or releasing it early and running away like many other games, we’ve taken these lessons seriously and have worked tirelessly to improve our game. As the patch notes show, many issues have been fixed. Our goal is to continue this journey until we create a flawless game. To meet the expectation of a radiation-themed, graphically impressive, and enjoyable game, we are planning a complete overhaul of Armed Mode, and we’ve already rolled up our sleeves to get started. Until this is achieved, the game will be shaped around Escape Mode. Thank you for your interest.
    Read full article on Community Announcements (Rasteinov)
  • Patch NotesOfficial

    Patch Notes 1.4.3

    Hello, we're here with an important announcement! We've added a new mode to the game called Escape Mode. Since Armed Mode was, to be honest, a bad and boring mode, we've decided to remove it for now and keep it in the background as we plan to bring it back with a completely new map, design, and concept. Of course, you’ll still be able to continue playing this mode. Our intention is to recreate Armed Mode at its best. Until we further develop Armed Mode, our game will be centered around Escape Mode. Since Escape Mode is still new, it is open to further improvements. Additionally: The sound system has been completely overhauled, and the distorted sound issue has been fixed. Device Input has been added to the settings. The startup crash issue has been resolved. Multiple bugs have been fixed. We’ll keep working until we unlock the game’s full potential! For suggestions, please join us on our Steam Forum or Discord. https://discord.gg/demonsomnia
    Read full article on Community Announcements (Rasteinov)

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