Cthulhu: The Cosmic Abyss

First-person investigative horror set in an ancient city beneath the ocean

Big Bad Wolf · Published by Nacon · Released Apr 16, 2026

Reviews: Mixed; 54% of 284
Recent reviews: Mixed; 40% of 15 in 30 days
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Unsupported
Last update on Steam: 5 months ago; May 13, 2026
Minimum PC: GeForce GTX 1060; 12 GB RAM · 16 GB disk; Full requirements

What is Cthulhu: The Cosmic Abyss?

This single-player, first-person horror adventure takes place in 2053, as Noah investigates missing miners beneath the Pacific Ocean. You explore R'lyeh with an AI companion, gather clues, and solve puzzles along branching paths, making decisions that shape Noah's fate while resisting Cthulhu's influence.

For you if...

+you enjoy connecting clues and solving investigative puzzles
+you want a branching story shaped by your decisions

Not for you if...

−you expect weapons and combat in your horror games

What players say

54% of 284 reviews are positive · 40% of 15 in the last 30 days

Players praise the atmosphere, visuals, and story. Their most common complaints concern progression-blocking bugs, unresponsive controls, and lost progress; recent reviews continue to describe these problems, often requiring reloads or restarts.

Screenshots and trailer

Cthulhu: The Cosmic Abyss system requirements

Minimum: GeForce GTX 1060, 12 GB RAM, 16 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 10 - 11
Processor: Intel Core i7-8700K or AMD Ryzen 5 1600X
Graphics: NVIDIA GeForce GTX 1060, 6 GB or AMD Radeon RX 590, 8 GB or Intel Arc A580, 8 GB
Memory: 12 GB RAM
Storage: 16 GB available space
DirectX: Version 12
Notes: HDD Supported, SSD Recommended. The above specifications were tested with performance upscaling enabled.

OS: Windows 11
Processor: Intel Core i5-12600K or AMD Ryzen 5 7600
Graphics: NVIDIA GeForce RTX 3070, 8 GB or AMD Radeon RX 6750 XT, 12 GB or Intel Arc B580, 12 GB
Memory: 16 GB RAM
Storage: 16 GB available space
DirectX: Version 12
Notes: HDD Supported, SSD Recommended. The above specifications were tested with performance upscaling enabled.

Does Cthulhu: The Cosmic Abyss have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Cthulhu: The Cosmic Abyss run on Steam Deck?

Unsupported No: Valve rates it Unsupported on Steam Deck.

Graphics settings cannot be configured to run well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows
Achievements: 27
Steam features: Cloud saves, Family Sharing
Age rating: 17+
Languages: Full audio: English. Text only: French, Italian, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Polish.

Does Cthulhu: The Cosmic Abyss use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

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