Free Underwater Games on Steam
Steam currently has 728 Underwater games available to download and play. Explore our list of the best free games ranked by popularity and ratings. Data for this list is calculated from reviews and player counts reported directly by Steam and will be updated in real-time. Free Underwater game rankings were last updated on 9/27/2025.
Looking for more? Explore other lists such as:
- Best underwater games on Steam
- Best underwater Steam Deck games
- Best underwater Steam games for Mac OS
- Best underwater Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. Shrimp.io
A Shrimp Based Bullet Heaven. Kill creatures, Level up & pick from 3 upgrades to unalive thousands more.
Shrimp.io holds the #1 spot for "best free Underwater game on Steam" with a Player Score of 78. Its score was calculated by analyzing a total of 247 reviews on Steam. This breaks down to a total of 210 positive reviews and 37 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Shrimp.io on the Steam Deck (though some functionality may be limited).
2. IronWolf: Free Non-VR Edition
This is the Free Non-VR version of IronWolf VR. A co-op submarine game with a light touch on realism, making the submarine sim genre accessible to a wider audience.
IronWolf: Free Non-VR Edition has achieved a Player Score of 88, placing it in the #2 spot for the best free Underwater games. Its score was calculated by analyzing a total of 590 reviews on Steam. This breaks down to a total of 558 positive reviews and 32 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play IronWolf: Free Non-VR Edition on the Steam Deck (though some functionality may be limited).
| Release Date | 9/14/2023 |
| Developer | Ionized Studios |
| Publisher | Ionized Studios |
| Steam App Id | 2530670 |
3. Dread Not
Avoid your watery grave in this asymmetrical co-op horror game where you and a friend take the roles of a submarine Pilot and Mechanic. Work together to repair the ship, solve puzzles, avoid a deadly creature, and make it back to the surface before time runs out! It's time to Sync or Swim
Dread Not has achieved a Player Score of 44, placing it in the #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 426 reviews on Steam. This breaks down to a total of 181 positive reviews and 245 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 6/15/2025 |
| Developer | Leviathan Interactive |
| Publisher | Leviathan Interactive |
| Steam App Id | 3616560 |
4. #7-J5Z: The Driftwood Experiment
A simple and short cozy game where you play as an unusual robot, exploring an underwater cave system.
#7-J5Z: The Driftwood Experiment has achieved a Player Score of 71, placing it in the #4 spot for the best free Underwater games. Its score was calculated by analyzing a total of 15 reviews on Steam. This breaks down to a total of 13 positive reviews and 2 negative reviews — making it "Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 4/30/2025 |
| Developer | Andrew "VAGRIENT" Bray |
| Publisher | Andrew VAGRIENT Bray |
| Steam App Id | 3342050 |
5. Together in Forgotten Lands: Chapter One
Two souls, one destiny. Embark on a co-op adventure through a forgotten land, where teamwork and wit are the only way to navigate the wonders and dangers of a magical cave.
Together in Forgotten Lands: Chapter One has achieved a Player Score of 83, placing it in the #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 193 reviews on Steam. This breaks down to a total of 176 positive reviews and 17 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 8/18/2025 |
| Developer | Vellichor Games |
| Publisher | Vellichor Games |
| Steam App Id | 3723610 |
6. Sync Or Sink
Trapped in a sinking submarine, two players must communicate through walkie-talkies to solve puzzles, complete tasks, navigate the depths, and escape before time runs out.
Sync Or Sink has achieved a Player Score of 77, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 67 reviews on Steam. This breaks down to a total of 59 positive reviews and 8 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 10/1/2025 |
| Developer | Low Effort Interactive |
| Publisher | Low Effort Interactive |
| Steam App Id | 3626910 |
7. Coral Cove
Coral Cove is a relaxing match 3-like underwater game in which you try to build the largest reef without running out of corals to place.
Coral Cove has achieved a Player Score of 84, placing it in the #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 142 reviews on Steam. This breaks down to a total of 133 positive reviews and 9 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Coral Cove on the Steam Deck (though some functionality may be limited).
| Release Date | 4/24/2023 |
| Developers | |
| Publisher | MediaCube Games |
| Steam App Id | 1919350 |
8. Infinite Blue
Discover an immersive ocean Eco-Sim where you can be almost any animal under the sea! From a tiny seahorse to a massive blue whale, experience the endless circle of life in a massive world of reefs, shipwrecks, and hidden wonders.
Infinite Blue has achieved a Player Score of 62, placing it in the #8 spot for the best free Underwater games. Its score was calculated by analyzing a total of 268 reviews on Steam. This breaks down to a total of 175 positive reviews and 93 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 6/6/2025 |
| Developer | Gluten Free Games |
| Publisher | Gluten Free Games |
| Steam App Id | 2775910 |
9. Submorse
Chill out in a submarine as you learn Morse code! Submorse is an atmospheric, first-person game that teaches you the international Morse signals.
Submorse has achieved a Player Score of 83, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 182 reviews on Steam. This breaks down to a total of 168 positive reviews and 14 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Submorse on the Steam Deck (though some functionality may be limited).
| Release Date | 3/31/2021 |
| Developer | Team Monumental |
| Publisher | Team Monumental |
| Steam App Id | 912380 |
10. ENDER OCEAN - Your mission: "Clean the Ocean"
The Ender Ocean principle? Locate and collect waste (plastic bags, bottles, lost nets...) thanks to underwater robots connected to a collection boat, in order to valorize them afterwards, all from home.
ENDER OCEAN - Your mission: "Clean the Ocean" has achieved a Player Score of 66, placing it in the #10 spot for the best free Underwater games. Its score was calculated by analyzing a total of 14 reviews on Steam. This breaks down to a total of 11 positive reviews and 3 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 9/9/2022 |
| Developer | Ender Ocean |
| Publisher | Ender Ocean |
| Steam App Id | 2108210 |
More Free Underwater Games
Explore even more rankings for the 88 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 69 | 2/12/2024 | 78 | Free | Steam Charts | |
| 9 | 9/14/2023 | 88 | Free | Steam Charts | |
| 5 | 6/15/2025 | 44 | Free | Steam Charts | |
| 4 | 4/30/2025 | 71 | Free | Steam Charts | |
| 4 | 8/18/2025 | 83 | Free | Steam Charts | |
| 2 | 10/1/2025 | 77 | Free | Steam Charts | |
| 2 | 4/24/2023 | 84 | Free | Steam Charts | |
| 2 | 6/6/2025 | 62 | Free | Steam Charts | |
| 2 | 3/31/2021 | 83 | Free | Steam Charts | |
| 1 | 9/9/2022 | 66 | Free | Steam Charts | |
 | 1 | 3/31/2025 | 80 | Free | Steam Charts | |
 | 1 | 7/15/2024 | 53 | Free | Steam Charts | |
 | 1 | 10/23/2024 | 70 | Free | Steam Charts | |
 | 1 | 9/12/2024 | 79 | Free | Steam Charts | |
 | 1 | 5/30/2024 | 72 | Free | Steam Charts | |
 | 1 | 1/2/2024 | 52 | Free | Steam Charts | |
 | 1 | 3/25/2024 | 67 | Free | Steam Charts | |
 | 1 | 3/28/2023 | 65 | Free | Steam Charts | |
 | 1 | 6/15/2024 | 81 | Free | Steam Charts | |
 | 1 | 7/17/2023 | 53 | Free | Steam Charts |
Soures & References
Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Player counts and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.
- Valve Corporation. (2025, September 27). Steam Store. Steam Store.
- Valve Corporation. (2025, September 27). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2025, October 4). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2025, October 25). Dread Not on Steam. Steam Store.
- Valve Corporation. (2025, October 12). #7-J5Z: The Driftwood Experiment on Steam. Steam Store.
- Valve Corporation. (2025, October 11). Together in Forgotten Lands: Chapter One on Steam. Steam Store.
- Valve Corporation. (2025, October 24). Sync Or Sink on Steam. Steam Store.
- Valve Corporation. (2025, October 2). Coral Cove on Steam. Steam Store.
- Valve Corporation. (2025, October 1). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2025, August 15). Submorse on Steam. Steam Store.
- Valve Corporation. (2025, August 17). ENDER OCEAN - Your mission: "Clean the Ocean" on Steam. Steam Store.