Screenshots
Watch trailer on Steam ↗Dark Sea
DarkSignal Studios · Published by DarkSignal Studios
Content notice: The game contains a dark atmosphere with references to sacrifice and imagery of occult content including human remains.
9 user reviews — 89% positive (9 reviews) · 6 achievements
Last updated 28 Sept 2026
When the research team from the classified Soviet organization known as O.D.I.S.E.A. went radio silent during an expedition deep beneath the Earth, you - a simple mechanic - were called upon to pilot an old prototype submarine and search for any trace of what happened and where they might have gone.
£0.95
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Adventure, Indie, Simulation · 2025 · More under £5 games
Explore the depths as a mechanic piloting an old submarine, searching for clues to the disappearance of a Soviet research team. Experience the tension and discovery in this indie adventure from DarkSignal Studios.
About this game
Dark Sea is a spooky adventure story game where you pilot an old rusty soviet research submarine known as P27 in search of the missing research team from the ODISEA Group.
Story
You play as Mr. Sidorov, a mechanic working for the secretive Soviet research group known as O.D.I.S.EA. You know little about the organization—only that your job is to maintain personal, one-man submarines used by the primary research team to explore deep fissures in the sea floor, known as Fractures.
After the detonation of the Tsar Bomba, a new Fracture—designated Fracture 17—opened in the nearby Kara Sea. Now, you've been called upon to pilot an old prototype submarine in search of the missing research team that vanished into Fracture 17 and lost all contact.
Gameplay
Dive deep beneath the Earths surface in search of your missing research team. Uncover the secrets of what they were searching for, and why they vanished. "Seek not, that which you do not wish to behold."
Key Features
Fire illumination flares for visibility
Deploy tracking beacons to aid navigation and avoid getting lost
Take photos of anything unusual or anomalous
Dock at stations to resupply
Use sonar to see the unseen
Use Beacons to Triangulate energy sources and stabilize anomalies
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: Intel Core i7 8700k or equivelent
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce GTX 1050 Ti or equivalent
- DirectX: Version 11
- Storage: 5 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Yet Another Crash Fix
V1.0.8Beacons have been further optimized to prevent excessive gpu strain and crashes.Heading updates have been connected to distance updates in the navigation screen. They now both update at .5 second intervals.Big thanks to user LongDongJohnson for sending their save file for me to take a look at, and also experimenting/investigating with me.If anyone else experiences crashes or other bugs, please put it in the pinned bug report discussion.Thank you :)Read full article on Community Announcements (Frendo)AnnouncementsOfficial
Quality of Life V2
V1.0.7 Change Logfixed being able to click on the systems screen buttons. You must now use the physical controls as intendedsubmarine docking collider now has higher tolerances, making it easier to slide indocking station collider has been tweaked to decrease chance of getting snagged on base while trying to dockadded lights around fracture entrance to make locating it easier if player drifts at startmade surface border walls appear on proxy detectors and sonar to better communicate play zone. Not ideal, I know.fixed some typosrewrote a puzzle hint to be an actual decent hintadded spotlights back to specific docking stationadjusted environmental colliders in some areas to make navigation betterfixed cases of freezing when trying to return to menu when finishing the gamephase anchor array is now undeployable and retracts automatically in the final area because you wont need it ;)added sound feedback when phase anchor gets a lock on the primary node and turns solid greenupdated manual pages to (hopefully) better communicate convergence well stabilizationadded more tape labelsfixed some small occlusion culling errorsincreased electric arc intervalsadded some more appearances of that one thing...Huge thank you to Mr Sark on Youtube and Twitch for being an unwitting QA tester.And thank you to everyone who has played, and put up with my shenanigans. This has been a learning experience for me and I've certainly learned a lot.Hope you all have fun :)Read full article on Community Announcements (Frendo)Patch NotesOfficial
The More Spookier Update
This update adds more spooks, frights, screams and shouts, specifically:More CommsSoundsEvents"Friends"Also made some minor adjustments to terrain and environment in some places.I hope you enjoy :DRead full article on Community Announcements (Frendo)Patch NotesOfficial
Quick Patch
Fixed a bug (I hope nobody found) where the final convergence field could decide to not have a primary node, rendering the game impossible to finish. Not good, I know. Hot spots (possible primary node locations) now have a faint purple glow in the general location to make tracking the primary node less tedious.Read full article on Community Announcements (Frendo)Patch NotesOfficial
QOL Fixes
Changes Increased engine reliability, so it should start more often now. Fixed a missing ignition sound effect. Modified linear damping on sub so it drifts less. Should make docking less frustrating.Read full article on Community Announcements (Frendo)
