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Cthulhu: The Cosmic Abyss

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Cthulhu: The Cosmic Abyss

Big Bad Wolf · Published by Nacon

Content notice: This game features violence, blood and gore.

Mixed — 57% positive (371 reviews) · 27 achievements

Last updated 28 Sept 2026

A mining station in the Pacific abyss is no longer responding. As an investigator of the occult, unravel the mysteries of the deep. Test your wits and sanity in this lovecraftian thriller.

ESRB m5 DLC available ↗Full Controller Support

£34.99

Lowest price we've ever recorded

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Price history

4 Sept 2026Lowest: £34.99 · Highest: £34.9913 Oct 2026

Adventure · 2026 · More £30+ games

Explore the eerie depths of Cthulhu: The Cosmic Abyss, an adventure where you investigate a mysterious mining station gone quiet. Navigate through haunting corridors, decipher ancient secrets, and face the terrors of the deep in this thrilling Lovecraftian experience.

About this game

R'LYEH EDITION


About the Game


2053. Across the globe, the occult threat grows ever more blatant, and strange, incomprehensible events multiply. As the Earth's surface resources dwindle, powerful corporations turn to the uncharted depths of the oceans, unaware of the ancient horror they are about to awaken.

In this tense Lovecraftian thriller, you play Noah, tasked with investigating the mysterious disappearance of miners in the depths of the Pacific Ocean. With the help of your AI companion, Key, explore the vast, labyrinthine prison of R'lyeh—an ancient, sunken city of cyclopean proportions—and resist the creeping madness caused by Cthulhu's influence. At its core lies a secret that could shatter your understanding of reality.

REVEAL THE UNSPEAKABLE

Face nightmares and cosmic abominations that will push your sanity to its limits. Journey through a futuristic reinterpretation of Lovecraft's mythos and uncover the legendary sunken city of R'lyeh. But beware: the deeper you descend, the more your mind succumbs to Cthulhu's relentless influence.

CHALLENGE THE BOUNDARIES OF YOUR MIND

Dive into the darkness with Key, your AI companion. Follow leads, gather scattered clues, and sharpen your detective skills to solve immersive and complex puzzles. Uncover hidden truths and look beyond appearances to choose your path to resolving the case. Every mystery offers branching routes and secret passages waiting to be discovered.

AN UNFORGETTABLE NARRATIVE EXPERIENCE

As an agent of Ancile, a secret division of Interpol specializing in occult affairs, you are thrust into a gripping story with complex characters, brought to life through cinematic storytelling. Immerse yourself in a first-person investigative horror adventure with a rich, branching narrative, where your choices and understanding will shape Noah’s fate in this nightmarish world.

Powered by Unreal Engine 5, Cthulhu: The Cosmic Abyss features mind-bending environments that defy the laws of physics, pushing the boundaries of immersive storytelling to new heights.

System Requirements

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Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10 - 11
  • Processor: Intel Core i7-8700K or AMD Ryzen 5 1600X
  • Memory: 12 GB RAM
  • Graphics: NVIDIA GeForce GTX 1060, 6 GB or AMD Radeon RX 590, 8 GB or Intel Arc A580, 8 GB
  • DirectX: Version 12
  • Storage: 16 GB available space
  • Additional Notes: HDD Supported, SSD Recommended. The above specifications were tested with performance upscaling enabled.

Recommended

Recommended:
  • Requires a 64-bit processor and operating system
  • OS: Windows 11
  • Processor: Intel Core i5-12600K or AMD Ryzen 5 7600
  • Memory: 16 GB RAM
  • Graphics: NVIDIA GeForce RTX 3070, 8 GB or AMD Radeon RX 6750 XT, 12 GB or Intel Arc B580, 12 GB
  • DirectX: Version 12
  • Storage: 16 GB available space
  • Additional Notes: HDD Supported, SSD Recommended. The above specifications were tested with performance upscaling enabled.

Supported Languages

English*, French, Italian, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Polish
*languages with full audio support

Latest news

  • Patch NotesOfficial

    PATCH NOTE - 13/05

    Hello Agents,A new update is now live for Cthulhu: The Cosmic Abyss. Our focus with this patch has been to address a range of remaining issues to the overall experience.We want to thank you for joining us on this journey into the abyss. Your feedback has been instrumental.Here are the details of what this update includes:GeneralFixed a sonar VFX issue when the player used it the first time after reloading a save.Fixed an issue that prevented players from using the jump feature.Fixed a MyNacon issue.Fixed localization issues.The ExcavationFixed an issue where the player could get stuck between crates.Fixed an issue where the player could get stuck at the end of the water current in the maze.The Other WorldFixed an issue where the water failed to render when navigating to the bottom edge.The CitadelFixed an issue that allowed players to walk through the floor at a specific location.The Last DoorFixed an issue where the Pigment sonar frequency didn’t create snapshot clues.Fixed an issue where the main stairs could disappear.Fixed an issue where the chest in the secret lodge could be opened with more sonar frequencies than expected.Fixed an issue where the star of shamash disappeared if a player used the respawn feature during a Remembrance of a Memorial.Fixed an issue related to inconsistent glyph behavior.Fixed an issue where the player could get out of bounds behind the stairs.Fixed a missing collision on a wall in “Reconstruction: Possibilities” room.Share Your ExperienceNow that this update is live, we would be incredibly grateful if you could share your thoughts on the game. If you've enjoyed your journey into the mystery, please consider leaving a review on Steam. Your perspective helps others decide whether to take the plunge!Thank you again for your support.
    Read full article on Community Announcements (Nacon)
  • AnnouncementsOfficial

    Celebrate Cosmic Horror in a new Bundle!

    Hello Agents,The stars have aligned today! We are thrilled to congratulate our friends on the launch of their own Lovecraftian adventure, Call of the Elder Gods, which is available now on Steam.To celebrate this cosmic occasion and our shared love for all things mysterious and mind-bending, we have teamed up to offer a special bundle for all fans of the genre. If you’ve enjoyed your descent into the abyss, you can now continue your journey into madness with the Cosmic Investigators Bundle!This bundle includes:Cthulhu: The Cosmic AbyssCall of the Elder GodsComplete your collection and get both games at a great price. Thank you for your incredible support, and we hope you’ll extend a warm welcome to another team dedicated to exploring the chilling depths of cosmic horror.Descend into madness here:
    Read full article on Community Announcements (Nacon)
  • AnnouncementsOfficial

    The critics have spoken!

    Dear agents,Since the launch of Cthulhu: The Cosmic Abyss, we've been navigating the abyss right alongside you. Your passion, your detailed feedback, and your bug reports have been the guiding lights for our team. We are listening, and we are committed to improving the game for everyone. Amidst this journey, we have been truly humbled by the incredible words and support many of you have shared about the game's atmosphere and story. Today, we wanted to take a moment to celebrate that positive reception and thank you for it.While we continue to work hard on patching and improving the experience, we are honored to share what critics and players have loved about their journey so far.Thank you for your patience, your passion, and for sticking with us.Follow us on Cthulhu: The Cosmic Abyss Socials: Cthulhu: The Cosmic Abyss' socials: Discord ► https://discord.gg/Nhz2grcx39X (Twitter) ► https://x.com/PlayCthulhuCAReddit ► https://www.reddit.com/r/CthulhuTheCosmicAbyss/TikTok ► https://www.tiktok.com/@playcthulhu Big Bad Wolf's socials: X (Twitter) ► https://discord.gg/Nhz2grcx39Website ► https://discord.gg/Nhz2grcx39Reddit Twitter Discord
    Read full article on Community Announcements (Nacon)
  • Patch NotesOfficial

    PATCH NOTE - 30/04

    We are back with another patch, packed with fixes for issues you've helped us identify. Your detailed reports are essential to this process, and we thank you for your continued support as we work to improve the game. Here are the full details:All ChaptersFixed some indications left regarding the presence of the shards even with DLCs deactivated. The Excavation Fixed an issue where the player could get stuck in upper parts of the station due to the water currents. Fixed an issue where the player could get stuck at the end of the water current in the maze. The Temple Fixed wall textures during the entrance of The Temple. Fixed Selina hair physics issue. The Other World Fixed an issue where the player could climb over a stone pillar due to missing collision. The Last Door Fixed an issue where the Electrum crystals had the location tag "Reconstruction: The Possibilities" instead of "Mausoleum of the Engineer" in the Vault. Fixed most cases regarding the spawns and falls out of bounds indefinitely issue. We are still working on the remaining edge cases. Fixed an issue where the Star of Shamash was unable to be placed correctly on the podium. The HeartFixed an issue where the light on Elsa's hair was flickering during the pre-ending cinematic. Fixed an issue where the music played on the unfolding bridge doesn't always trigger. Fixed an issue when opening the pause menu at certain timings could cause the Final Choice to hang on a black screen. Thank you again for playing!
    Read full article on Community Announcements (Nacon)
  • Patch NotesOfficial

    PATCH NOTE - 24/04

    A new patch is now live for PC players! We've been hard at work on another round of fixes based on your valuable feedback. Thank you for your continued support as we work to improve the game 🙏All Chapters (Steam Only) Fixed AZERTY/QWERTY keyboard layout detection relative to system keyboard language (this should now also handle keyboard language swapping mid-game) Fixed performance issue related to evolution upgrade perks Fixed scrolling in single page tutorials and add bottom spacer The Excavation(Steam Only) Fixed partial loss of controls happening on saves reloaded from the demo version(Steam Only) Fixed dialogue trigger and station reboot issue when reloading a save from the demo onto the final version Fixed an issue where the way out of Q2 through the water current could be hard to understand Fixed Anastasia's card not returning to its last saved location after reloading in the Scientific Module Fixed an issue where the use of the Respawn feature right after rebooting the station could prevent Andrew Marsh’s video log from playing Fixed an issue where the use of the Respawn feature underwater, on the way to the maze, did not reload the station assets properly Fixed helmet opening animation replaying after coming back into the station and using the Respawn featureThe TempleFixed an issue where the use of the Respawn feature after crossing the west or east wing would cause the lighting and water to be removed from the main part of the temple The Other WorldFixed the remaining glow of Q4’s shard in the Crater area even with the DLCs deactivatedThe Last DoorFixed some clue names not properly revealed without the observation of the “Stele of the Overseers” even if the player had unlocked the Yith translation in The Citadel
    Read full article on Community Announcements (Nacon)

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