Free Underwater Games on Steam
Steam currently has 770 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 12/19/2025.
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 254 reviews on Steam. This breaks down to a total of 216 positive reviews and 38 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 607 reviews on Steam. This breaks down to a total of 575 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. Dry Visit - Virtual Underwater Visit - iMARECulture
Thanks to the iMARECULTURE project, you can virtually dive into the 3D reconstructions of 3 of the most beautiful UW archaeological sites of the Mediterranean Sea: the UW Archaeological Park of Baiae (Naples, Italy), the Phoenician shipwreck of Xlendi (Gozo, Malta) and the Mazotos Shipwreck (Cyprus)
Dry Visit - Virtual Underwater Visit - iMARECulture has achieved a Player Score of 72, placing it in the #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 12 reviews on Steam. This breaks down to a total of 11 positive reviews and 1 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 | 5/4/2020 |
| Developer | 3D Research Srl |
| Publisher | 3D Research Srl |
| Steam App Id | 1242830 |
4. Pearls of Atlantis: The Cove
Color match in a whole new way! Drop, pop, swap and match magic pearls to collect the charms inside and rebuild the hidden Cove of Memories!
Pearls of Atlantis: The Cove has achieved a Player Score of 70, placing it in the #4 spot for the best free Underwater games. Its score was calculated by analyzing a total of 44 reviews on Steam. This breaks down to a total of 35 positive reviews and 9 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Pearls of Atlantis: The Cove on the Steam Deck (though some functionality may be limited).
| Release Date | 2/15/2024 |
| Developer | Alder Games |
| Publisher | Legacy Games |
| Steam App Id | 2678160 |
5. 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 #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 116 reviews on Steam. This breaks down to a total of 105 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 |
6. Fishing Online
Begin your new online fishing adventure! Fishing Online is a cooperative adventure game where you explore the world and enjoy fishing with friends. Catch over 300 types of fish, complete your collection, and dive into crafting and cooking activities!
Fishing Online has achieved a Player Score of 55, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 128 reviews on Steam. This breaks down to a total of 73 positive reviews and 55 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Fishing Online on the Steam Deck.
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 63, placing it in the #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 298 reviews on Steam. This breaks down to a total of 197 positive reviews and 101 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. 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 #8 spot for the best free Underwater games. Its score was calculated by analyzing a total of 2,384 reviews on Steam. This breaks down to a total of 2,321 positive reviews and 63 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 |
9. 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 45, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 488 reviews on Steam. This breaks down to a total of 218 positive reviews and 270 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 |
10. Oceans
Adapt your Species to survive and thrive in the Oceans depths in this turn-based strategy game based on the hit board game Oceans.
Oceans has achieved a Player Score of 60, placing it in the #10 spot for the best free Underwater games. Its score was calculated by analyzing a total of 62 reviews on Steam. This breaks down to a total of 40 positive reviews and 22 negative reviews — making it "Mixed" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Oceans on the Steam Deck (though some functionality may be limited).
| Release Date | 11/16/2022 |
| Developers | |
| Publisher | North Star Games |
| Steam App Id | 1945310 |
More Free Underwater Games
Explore even more rankings for the 89 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 84 | 2/13/2024 | 78 | Free | Steam Charts | |
| 8 | 9/14/2023 | 88 | Free | Steam Charts | |
| 7 | 5/4/2020 | 72 | Free | Steam Charts | |
| 6 | 2/15/2024 | 70 | Free | Steam Charts | |
| 3 | 10/1/2025 | 81 | Free | Steam Charts | |
| 3 | 7/31/2025 | 55 | Free | Steam Charts | |
| 3 | 6/6/2025 | 63 | Free | Steam Charts | |
| 2 | 9/3/2021 | 93 | Free | Steam Charts | |
| 2 | 6/15/2025 | 45 | Free | Steam Charts | |
| 2 | 11/16/2022 | 60 | Free | Steam Charts | |
 | 2 | 6/3/2025 | 72 | Free | Steam Charts | |
 | 2 | 8/29/2025 | 49 | Free | Steam Charts | |
 | 2 | 8/18/2025 | 82 | Free | Steam Charts | |
 | 1 | 5/9/2022 | 71 | Free | Steam Charts | |
 | 1 | 12/8/2023 | 78 | Free | Steam Charts | |
 | 1 | 10/31/2024 | 63 | Free | Steam Charts | |
 | 1 | 9/18/2023 | 63 | Free | Steam Charts | |
 | 1 | 8/14/2025 | 82 | Free | Steam Charts | |
 | 1 | 12/20/2024 | 54 | Free | Steam Charts | |
 | 1 | 3/22/2024 | 65 | 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 19). Steam Store. Steam Store.
- Valve Corporation. (2025, December 19). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2025, October 4). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2025, November 14). Dry Visit - Virtual Underwater Visit - iMARECulture on Steam. Steam Store.
- Valve Corporation. (2025, November 4). Pearls of Atlantis: The Cove on Steam. Steam Store.
- Valve Corporation. (2025, December 13). Sync Or Sink on Steam. Steam Store.
- Valve Corporation. (2025, December 22). Fishing Online on Steam. Steam Store.
- Valve Corporation. (2025, December 23). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2025, November 28). Swallow the Sea on Steam. Steam Store.
- Valve Corporation. (2025, December 2). Dread Not on Steam. Steam Store.
- Valve Corporation. (2025, November 28). Oceans on Steam. Steam Store.