Free Underwater Games on Steam
Steam currently has 659 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 6/18/2025.
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. 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 holds the #1 spot for "best free Underwater game on Steam" with a Player Score of 63. Its score was calculated by analyzing a total of 5 reviews on Steam. This breaks down to a total of 4 positive reviews and 1 negative reviews — making it "5 user reviews" 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 |
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 550 reviews on Steam. This breaks down to a total of 520 positive reviews and 30 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. 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 64, placing it in the #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 235 reviews on Steam. This breaks down to a total of 158 positive reviews and 77 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 |
4. 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 #4 spot for the best free Underwater games. Its score was calculated by analyzing a total of 2,307 reviews on Steam. This breaks down to a total of 2,249 positive reviews and 58 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 |
5. Shrimp.io
A Shrimp Based Bullet Heaven. Kill creatures, Level up & pick from 3 upgrades to unalive thousands more.
Shrimp.io has achieved a Player Score of 80, placing it in the #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 231 reviews on Steam. This breaks down to a total of 201 positive reviews and 30 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).
6. Cozy Aquarium
Immerse yourself in a beautifully designed world where you can create, decorate, and manage your very own aquarium while enjoying soothing Lofi music. Whether you're looking to unwind after a long day or boost your productivity, CozyAquarium offers something for everyone.
Cozy Aquarium has achieved a Player Score of 65, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 26 reviews on Steam. This breaks down to a total of 19 positive reviews and 7 negative reviews — making it "Mostly 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 | 2/10/2025 |
| Developer | Happy Amoeba |
| Publisher | Happy Amoeba |
| Steam App Id | 3476790 |
7. CREAMARE - The Game
In CREAMARE: The Game, players take on the role of divers to explore 9 real underwater cultural sites in the Mediterranean Sea. They must defeat a monster from the future by solving ecological challenges and puzzles related to the history of these sites.
CREAMARE - The Game has achieved a Player Score of 48, placing it in the #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 11 reviews on Steam. This breaks down to a total of 5 positive reviews and 6 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 | 5/30/2025 |
| Developer | 3D Research Srl |
| Publisher | CREAMARE Project |
| Steam App Id | 3154190 |
8. 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 65, placing it in the #8 spot for the best free Underwater games. Its score was calculated by analyzing a total of 215 reviews on Steam. This breaks down to a total of 148 positive reviews and 67 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 |
9. Ocean Protector
Ocean Protector is a free online educational game that teaches students about the impacts of ocean acidification and how they can take action to prevent it.
Ocean Protector has achieved a Player Score of 64, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 9 reviews on Steam. This breaks down to a total of 7 positive reviews and 2 negative reviews — making it "9 user reviews" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is not possible to play or run Ocean Protector on the Steam Deck.
| Release Date | 8/30/2023 |
| Developer | Outreach Games |
| Publisher | Outreach Games |
| Steam App Id | 2553210 |
10. Pakicetus Redux
In deep-sea action-adventure game Pakicetus Redux, take command, choose your mission, and lead the escort submarine Salvation along a seafloor rift. Balance resource collection, upgrades, and the fate of human civilization as you battle an emerging enemy bent on stopping your search for a new home.
Pakicetus Redux has achieved a Player Score of 65, placing it in the #10 spot for the best free Underwater games. Its score was calculated by analyzing a total of 6 reviews on Steam. This breaks down to a total of 5 positive reviews and 1 negative reviews — making it "6 user reviews" 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 | 4/11/2025 |
| Developers | |
| Publisher | Polymorphic Games |
| Steam App Id | 2069380 |
More Free Underwater Games
Explore even more rankings for the 77 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 12 | 6/15/2025 | 63 | Free | Steam Charts | |
| 5 | 9/14/2023 | 88 | Free | Steam Charts | |
| 3 | 6/6/2025 | 64 | Free | Steam Charts | |
| 2 | 9/3/2021 | 93 | Free | Steam Charts | |
| 2 | 2/13/2024 | 80 | Free | Steam Charts | |
| 2 | 2/10/2025 | 65 | Free | Steam Charts | |
| 2 | 5/30/2025 | 48 | Free | Steam Charts | |
| 1 | 9/1/2020 | 65 | Free | Steam Charts | |
| 1 | 8/30/2023 | 64 | Free | Steam Charts | |
| 1 | 4/11/2025 | 65 | Free | Steam Charts | |
 | 1 | 5/4/2020 | 72 | Free | Steam Charts | |
 | 1 | 3/22/2024 | 69 | Free | Steam Charts | |
 | 1 | 4/30/2025 | 62 | Free | Steam Charts | |
 | 1 | 9/9/2022 | 63 | Free | Steam Charts | |
 | 1 | 3/31/2021 | 83 | Free | Steam Charts | |
 | 1 | 2/15/2024 | 71 | Free | Steam Charts | |
 | 1 | 7/15/2024 | 53 | Free | Steam Charts | |
 | 1 | 7/15/2024 | 70 | Free | Steam Charts | |
 | 1 | 5/31/2024 | 72 | Free | Steam Charts | |
 | 1 | 1/2/2024 | 52 | 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, June 18). Steam Store. Steam Store.
- Valve Corporation. (2025, June 18). Dread Not on Steam. Steam Store.
- Valve Corporation. (2025, May 28). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2025, June 11). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2025, May 14). Swallow the Sea on Steam. Steam Store.
- Valve Corporation. (2025, June 12). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2025, June 17). Cozy Aquarium on Steam. Steam Store.
- Valve Corporation. (2025, June 3). CREAMARE - The Game on Steam. Steam Store.
- Valve Corporation. (2025, June 14). INFLUXIS on Steam. Steam Store.
- Valve Corporation. (2025, May 15). Ocean Protector on Steam. Steam Store.
- Valve Corporation. (2025, April 11). Pakicetus Redux on Steam. Steam Store.