Hidden Deep is an indie 2D action & exploration sci-fi thriller that is set in an abandoned mining and research facility – more than a mile deep under the ocean floor.
A group of researchers has detected strange anomalies of unknown nature and then organized an expedition to examine this mysterious and unexplainable phenomenon. All of a sudden, after 681 days, contact with the researchers breaks off. You are the leader of the second team that needs to go search of the missing and possibly save them: Go down into the unknown, find out what happened, rescue anybody who is still alive, if any survivors are still roaming the facility.
COMMAND YOUR TEAM – OPERATE THE EQUIPMENT – FACE UNEXPLAINABLE HORRORS
Control all of your team members directly or by giving them different orders. Accomplish your mission objectives by coordinating together on different tasks. Explore the mysterious sub oceanic caves by using specialized gear: grappling hooks, scanners, drones and heavy machinery are all an integral part of your arsenal and preparation.
Defend yourself against the horrific life forms you encounter and other environmental threats on your way, there are plenty of undiscovered horrors that lurk in the deep tunnels and danger could come from any direction in this unforgiving place. Make sure to navigate through the facility and passage system carefully enough though, as sometimes things are not as they seem.
Would you be able to resolve the necessary issues and manage to find the missing team or keep your team intact? This is yet to be discovered once you leave the elevator with your team and heavy machinery tech.
ENJOY MULTIPLE GAME MODES – ALONE OR IN CO-OP
Hidden Deep offers both a story mode with narrative-driven levels and a challenge mode where you can tackle on various mission goals in randomized levels, either alone or in co-op.
GAME FEATURES:
A rich dark sci-fi story with many horror elements and surprises.
The story pays huge tribute to 80's and 90's games and movie classics such as Aliens, The Thing, and Half-Life.
Tons of tools to use from grappling hooks and scanner balls to drones, weapons and heavy duty machinery that would allow you to map the caves and effectively progress through them.
More than 20 hours of exciting gameplay in the main story mode (will be completed within the game’s Early Access period).
Challenge mode for even more adventures in the deep cave system.
Local co-op and Remote Play co-op already available (Online co-op is going to be introduced within the game’s Early Access period).
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-11-24
We Don’t Do Black Friday, We Do Better!
You want to get the best gaming price deals available on the market, right? Well, look no further than our ANTI-BLACK FRIDAY promotion then, as we got a storewide campaign that would blow you away not just for a single day or a weekend, but for a total of 5 whole days. That is far from everything though, just make an order of at least 20€ between 26.11.2025 12:00 CET and 01.12.2025 15:00 CET, and you will get a FREE game…
Tired of Fake Black Friday Discounts? Score Some Real Deals Instead
Amidst the craze that usually happens at the season of drop-down MEGA sales, we actually are not finding it hard to offer outstanding prices to our audience, as we do that on a pretty regular basis. Almost every year at the time for BLACK FRIDAY the prices around the market get slightly heightened and then reduced in a way to mimic major drops and discounts to the clients, but we do not favor such bad practice and this is why we decided to do something more different...
Some in-game text is small and may be difficult to read
This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
All functionality is accessible when using the default controller configuration
This game shows Steam Deck controller icons
This game's default graphics configuration performs well on Steam Deck