Free Underwater Games on Steam
Steam currently has 758 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 10/29/2025.
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 79. Its score was calculated by analyzing a total of 250 reviews on Steam. This breaks down to a total of 213 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 601 reviews on Steam. This breaks down to a total of 569 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. 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 #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 126 reviews on Steam. This breaks down to a total of 71 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.
4. 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 82, placing it in the #4 spot for the best free Underwater games. Its score was calculated by analyzing a total of 200 reviews on Steam. This breaks down to a total of 181 positive reviews and 19 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 |
5. 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 #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 476 reviews on Steam. This breaks down to a total of 212 positive reviews and 264 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 |
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 81, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 107 reviews on Steam. This breaks down to a total of 97 positive reviews and 10 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. South Scrimshaw, Part One
South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.
South Scrimshaw, Part One has achieved a Player Score of 94, placing it in the #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 1,486 reviews on Steam. This breaks down to a total of 1,471 positive reviews and 15 negative reviews — making it "Overwhelmingly Positive" on Steam.
It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play South Scrimshaw, Part One on the Steam Deck (though some functionality may be limited).
| Release Date | 6/9/2023 |
| Developer | Nathan O. Marsh |
| Publisher | Nathan O. Marsh |
| Steam App Id | 2443110 |
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 2,375 reviews on Steam. This breaks down to a total of 2,312 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. Aquarist - My First Job
Get your first job in the Aquarist! Learn how to set up aquarium, decorate it and take care of your fish!
Aquarist - My First Job has achieved a Player Score of 60, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 115 reviews on Steam. This breaks down to a total of 73 positive reviews and 42 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Aquarist - My First Job on the Steam Deck (though some functionality may be limited).
| Release Date | 9/16/2021 |
| Developers | |
| Publishers | |
| Steam App Id | 1584660 |
10. Scyla
Dive into the waters of Scyla, a third-person 3D exploration adventure inspired by Lovecraft's universe. Discover the mysteries hidden into the depths as you pilot a submarine through a strange cave system. Run away from a criature that stalks you.
Scyla 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 systems. At the moment, it is possible to play Scyla on the Steam Deck (though some functionality may be limited).
| Release Date | 7/15/2024 |
| Developer | Belice Studios |
| Publishers | |
| Steam App Id | 2984210 |
More Free Underwater Games
Explore even more rankings for the 88 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 103 | 2/13/2024 | 79 | Free | Steam Charts | |
| 7 | 9/14/2023 | 88 | Free | Steam Charts | |
| 4 | 7/31/2025 | 55 | Free | Steam Charts | |
| 3 | 8/18/2025 | 82 | Free | Steam Charts | |
| 3 | 6/15/2025 | 45 | Free | Steam Charts | |
| 2 | 10/1/2025 | 81 | Free | Steam Charts | |
| 2 | 6/9/2023 | 94 | Free | Steam Charts | |
| 2 | 9/3/2021 | 93 | Free | Steam Charts | |
| 2 | 9/16/2021 | 60 | Free | Steam Charts | |
| 1 | 7/15/2024 | 66 | Free | Steam Charts | |
 | 1 | 11/16/2022 | 60 | 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 | 7/17/2023 | 53 | Free | Steam Charts | |
 | 1 | 5/9/2022 | 71 | Free | Steam Charts | |
 | 1 | 12/8/2023 | 78 | Free | Steam Charts | |
 | 1 | 10/31/2024 | 60 | 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, October 29). Steam Store. Steam Store.
- Valve Corporation. (2025, October 29). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2025, October 4). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2025, November 30). Fishing Online on Steam. Steam Store.
- Valve Corporation. (2025, November 20). Together in Forgotten Lands: Chapter One on Steam. Steam Store.
- Valve Corporation. (2025, December 2). Dread Not on Steam. Steam Store.
- Valve Corporation. (2025, November 15). Sync Or Sink on Steam. Steam Store.
- Valve Corporation. (2025, November 20). South Scrimshaw, Part One on Steam. Steam Store.
- Valve Corporation. (2025, November 28). Swallow the Sea on Steam. Steam Store.
- Valve Corporation. (2025, November 4). Aquarist - My First Job on Steam. Steam Store.
- Valve Corporation. (2025, November 22). Scyla on Steam. Steam Store.