Demonsomnia

Co-op bodycam horror where a pursuer hears your microphone

Serhat Akgul · Published by Demonsomnia Team · Released Aug 13, 2024 · Early Access

Early Access, no updates for over a year AI-generated content disclosed

Reviews: Mostly Negative; 33% of 295
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 1 year ago; Dec 24, 2024
Minimum PC: GTX 970; 8 GB RAM · 20 GB disk; Full requirements

What is Demonsomnia?

Demonsomnia is an Early Access first-person horror game about a government team investigating nuclear reactions. Play alone or with others online across three modes, collecting supplies in a forest and buildings to hunt demons, activate a nuclear device, and escape mutants. Depending on the mode, you use guns or work without weapons.

For you if...

+you enjoy coordinating with friends in horror games
+you like horror that blends supernatural and science-fiction themes

Not for you if...

−you prefer horror without sudden jump scares

What players say

33% of 295 reviews are positive

Players praise the environmental visuals, but complain about unclear instructions, bugs, and unfinished mechanics. More recent comments also raise concerns about whether development is continuing.

Screenshots and trailer

Demonsomnia system requirements

Minimum: GTX 970, 8 GB RAM, 20 GB of disk space.

As published by the developer.

Can my PC run Demonsomnia?

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Minimum

OS: Windows 10, 64 Bit
Processor: Intel Core i5-4430 / AMD FX-6300
Graphics: NVIDIA GTX 970 / AMD Radeon R9 390
Memory: 8 GB RAM
Storage: 20 GB available space
DirectX: Version 11

Does Demonsomnia have co-op or multiplayer?

Yes: co-op online. It also has a single-player mode.

Does Demonsomnia run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
Display output not correctly scaled
The native resolution is not the default one
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 2
Steam features: Cloud saves, Family Sharing
Languages: Text only: English, French, Italian, German, Spanish - Spain, Simplified Chinese, Japanese, Korean, Russian, Turkish, Ukrainian, Arabic.

Does Demonsomnia use AI-generated content?

Yes. The developers disclose AI-generated content on the game's Steam page:

AI assistance was utilized in creating the loading screen images, some in-game painting images in Demonsomnia, and some images on the store page.

The statement mentions: ArtStore page & marketing

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam