Free Underwater Games on Steam
Steam currently has 779 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 12/30/2025.
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 255 reviews on Steam. This breaks down to a total of 216 positive reviews and 39 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. Tidal Shock: Off The Hook
It's a wet and wild PvP shooter for 2-12 players! Hunt down foes on high-speed torpedoes, Outmaneuver rivals with 360° tactics, and master 4 high-stakes game modes in sprawling underwater arenas. Always free to play, never pay to win!
Tidal Shock: Off The Hook has achieved a Player Score of 74, placing it in the #2 spot for the best free Underwater games. Its score was calculated by analyzing a total of 100 reviews on Steam. This breaks down to a total of 82 positive reviews and 18 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
| Release Date | 4/18/2025 |
| Developer | Moonray Studios |
| Publisher | Moonray Studios |
| Steam App Id | 1262890 |
3. 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 #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 609 reviews on Steam. This breaks down to a total of 576 positive reviews and 33 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 |
4. 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 46, placing it in the #4 spot for the best free Underwater games. Its score was calculated by analyzing a total of 494 reviews on Steam. This breaks down to a total of 221 positive reviews and 273 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 |
5. Swallow the Sea
You are a lowly egg cell on a journey through a swollen sea of strange and humanoid fish. Prey on smaller life and growing larger and stronger to perhaps someday be born.
Swallow the Sea has achieved a Player Score of 93, placing it in the #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 2,393 reviews on Steam. This breaks down to a total of 2,329 positive reviews and 64 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 9/3/2021 |
| Franchise | ItsTheTalia |
| Developers | |
| Publisher | ItsTheTalia |
| Steam App Id | 1511860 |
6. INFLUXIS
Explore a mesmerizing alien world, filled with deep bioluminescent wonders and horrors alike. Old alien artefacts await uncovering, in your search for the lost crew of Lazarus, in the search for your family in the depths of planet Eo-III.
INFLUXIS has achieved a Player Score of 64, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 233 reviews on Steam. This breaks down to a total of 157 positive reviews and 76 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 | 9/1/2020 |
| Developer | BaleYc Studios |
| Publisher | BaleYc Studios |
| Steam App Id | 1393830 |
7. 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 #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 305 reviews on Steam. This breaks down to a total of 198 positive reviews and 107 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 |
8. 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 #8 spot for the best free Underwater games. Its score was calculated by analyzing a total of 144 reviews on Steam. This breaks down to a total of 135 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 |
9. 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 81, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 118 reviews on Steam. This breaks down to a total of 107 positive reviews and 11 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 |
10. Motarium
🫧 Motarium is a free collection of word games set in a relaxing underwater world. Anagrams, word searches, hangman, SUTOM and more. Dive into a sea of words and challenge your brain in a calm, beautiful environment.
Motarium has achieved a Player Score of ?, placing it in the #10 spot for the best free Underwater games. Its score was calculated by analyzing a total of undefined reviews on Steam. This breaks down to a total of undefined positive reviews and undefined negative reviews — making it "null" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
More Free Underwater Games
Explore even more rankings for the 90 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 87 | 2/13/2024 | 78 | Free | Steam Charts | |
| 16 | 4/18/2025 | 74 | Free | Steam Charts | |
| 3 | 9/14/2023 | 88 | Free | Steam Charts | |
| 3 | 6/15/2025 | 46 | Free | Steam Charts | |
| 3 | 9/3/2021 | 93 | Free | Steam Charts | |
| 2 | 9/1/2020 | 64 | Free | Steam Charts | |
| 2 | 6/6/2025 | 62 | Free | Steam Charts | |
| 2 | 4/24/2023 | 84 | Free | Steam Charts | |
| 2 | 10/1/2025 | 81 | Free | Steam Charts | |
| 2 | 1/12/2026 | ??? | Free | Steam Charts | |
 | 2 | 8/18/2025 | 82 | Free | Steam Charts | |
 | 2 | 2/15/2024 | 71 | Free | Steam Charts | |
 | 1 | 5/9/2022 | 72 | Free | Steam Charts | |
 | 1 | 12/8/2023 | 78 | Free | Steam Charts | |
 | 1 | 9/18/2023 | 63 | Free | Steam Charts | |
 | 1 | 8/14/2025 | 82 | Free | Steam Charts | |
 | 1 | 12/20/2024 | 56 | Free | Steam Charts | |
 | 1 | 3/22/2024 | 67 | Free | Steam Charts | |
 | 1 | 4/11/2025 | 67 | Free | Steam Charts | |
 | 1 | 2/11/2021 | 57 | 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, December 30). Steam Store. Steam Store.
- Valve Corporation. (2025, December 30). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2025, December 26). Tidal Shock: Off The Hook on Steam. Steam Store.
- Valve Corporation. (2025, October 4). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2025, December 2). Dread Not on Steam. Steam Store.
- Valve Corporation. (2025, November 28). Swallow the Sea on Steam. Steam Store.
- Valve Corporation. (2025, October 5). INFLUXIS on Steam. Steam Store.
- Valve Corporation. (2026, January 12). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2025, October 2). Coral Cove on Steam. Steam Store.
- Valve Corporation. (2025, December 13). Sync Or Sink on Steam. Steam Store.
- Valve Corporation. (2026, January 12). Motarium on Steam. Steam Store.