Free Underwater Games on Steam
Steam currently has 670 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 7/5/2025.
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. 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 holds the #1 spot for "best free Underwater game on Steam" with a Player Score of 94. Its score was calculated by analyzing a total of 1,404 reviews on Steam. This breaks down to a total of 1,393 positive reviews and 11 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 |
2. 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 #2 spot for the best free Underwater games. Its score was calculated by analyzing a total of 245 reviews on Steam. This breaks down to a total of 163 positive reviews and 82 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 |
3. 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 71, placing it in the #3 spot for the best free Underwater games. Its score was calculated by analyzing a total of 42 reviews on Steam. This breaks down to a total of 34 positive reviews and 8 negative reviews — making it "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 |
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 2,324 reviews on Steam. This breaks down to a total of 2,265 positive reviews and 59 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. 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 #5 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 |
6. Pelagos: A Marine Adventure
Dive into Pelagos: Snap, Learn & Explore Marine Ecosystems!
Pelagos: A Marine Adventure 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 22 reviews on Steam. This breaks down to a total of 16 positive reviews and 6 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 Pelagos: A Marine Adventure on the Steam Deck (though some functionality may be limited).
| Release Date | 11/20/2023 |
| Developer | Rishi Garhyan |
| Publisher | Rishi Garhyan |
| Steam App Id | 2645390 |
7. 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 #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 220 reviews on Steam. This breaks down to a total of 151 positive reviews and 69 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 |
8. 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 #8 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 |
9. 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 67, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 7 reviews on Steam. This breaks down to a total of 6 positive reviews and 1 negative reviews — making it "7 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 |
10. 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 #10 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 |
More Free Underwater Games
Explore even more rankings for the 79 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 3 | 6/9/2023 | 94 | Free | Steam Charts | |
| 3 | 6/6/2025 | 63 | Free | Steam Charts | |
| 2 | 2/15/2024 | 71 | Free | Steam Charts | |
| 2 | 9/3/2021 | 93 | Free | Steam Charts | |
| 2 | 2/10/2025 | 65 | Free | Steam Charts | |
| 1 | 11/20/2023 | 64 | Free | Steam Charts | |
| 1 | 9/1/2020 | 65 | Free | Steam Charts | |
| 1 | 8/30/2023 | 64 | Free | Steam Charts | |
| 1 | 4/11/2025 | 67 | Free | Steam Charts | |
| 1 | 5/4/2020 | 72 | Free | Steam Charts | |
 | 1 | 3/22/2024 | 69 | Free | Steam Charts | |
 | 1 | 4/30/2025 | 65 | Free | Steam Charts | |
 | 1 | 9/9/2022 | 65 | Free | Steam Charts | |
 | 1 | 3/31/2021 | 83 | Free | Steam Charts | |
 | 1 | 7/15/2024 | 53 | Free | Steam Charts | |
 | 1 | 7/15/2024 | 71 | Free | Steam Charts | |
 | 1 | 5/31/2024 | 72 | Free | Steam Charts | |
 | 1 | 1/2/2024 | 52 | Free | Steam Charts | |
 | 1 | 3/28/2023 | 65 | Free | Steam Charts | |
 | 1 | 6/15/2024 | 81 | 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, July 5). Steam Store. Steam Store.
- Valve Corporation. (2025, July 5). South Scrimshaw, Part One on Steam. Steam Store.
- Valve Corporation. (2025, June 28). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2025, July 2). Pearls of Atlantis: The Cove on Steam. Steam Store.
- Valve Corporation. (2025, July 7). Swallow the Sea on Steam. Steam Store.
- Valve Corporation. (2025, July 13). Cozy Aquarium on Steam. Steam Store.
- Valve Corporation. (2025, May 20). Pelagos: A Marine Adventure on Steam. Steam Store.
- Valve Corporation. (2025, July 2). 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.
- Valve Corporation. (2025, March 15). Dry Visit - Virtual Underwater Visit - iMARECulture on Steam. Steam Store.