Free Underwater Games on Steam
Steam currently has 860 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 4/3/2026.
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 262 reviews on Steam. This breaks down to a total of 221 positive reviews and 41 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. SHRIMP GAME: KRILL CONFIRMED
SHRIMP GAME: KRILL CONFIRMED is a solo or multiplayer third-person shooter RPG intro to SHRIMP GAME set in an abyssal realm. Pilot your SHRIMP platform to fight giant sea monsters, master elemental classes, and unearth secrets in a co-op campaign, or just krill your friends in multiplayer PVP!
SHRIMP GAME: KRILL CONFIRMED has achieved a Player Score of 83, placing it in the #2 spot for the best free Underwater games. Its score was calculated by analyzing a total of 59 reviews on Steam. This breaks down to a total of 57 positive reviews and 2 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 | 5/6/2026 |
| Franchise | GIGATANK3000 |
| Developers | |
| Publisher | GIGATANK 3000 |
| Steam App Id | 4597330 |
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 647 reviews on Steam. This breaks down to a total of 609 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 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 527 reviews on Steam. This breaks down to a total of 238 positive reviews and 289 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. FincrementalOS
Blast away with a submarine’s cannon and sort your desktop for minigames in this incremental fish shooting and simulated operating system hybrid!
FincrementalOS has achieved a Player Score of 78, placing it in the #5 spot for the best free Underwater games. Its score was calculated by analyzing a total of 31 reviews on Steam. This breaks down to a total of 29 positive reviews and 2 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 | 5/1/2026 |
| Developer | Calamafia Studio |
| Publishers | |
| Steam App Id | 4408540 |
6. Aquarius
Aquarius is a 90's style arcade game where you play as a cave diver in search for treasure, guarded by the ocean's fiercest predators and its cuddliest minnows. Navigate through the caves, collect the treasure, and survive!
Aquarius has achieved a Player Score of 78, placing it in the #6 spot for the best free Underwater games. Its score was calculated by analyzing a total of 39 reviews on Steam. This breaks down to a total of 36 positive reviews and 3 negative reviews — making it "Positive" 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 | 3/10/2020 |
| Developer | Iron Stag Games |
| Publisher | Iron Stag Games |
| Steam App Id | 1202570 |
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 64, placing it in the #7 spot for the best free Underwater games. Its score was calculated by analyzing a total of 342 reviews on Steam. This breaks down to a total of 227 positive reviews and 115 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. 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 69, placing it in the #8 spot for the best free Underwater games. Its score was calculated by analyzing a total of 46 reviews on Steam. This breaks down to a total of 36 positive reviews and 10 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 |
9. 疯狂炮炮捕鱼
超爽福利版《疯狂炮炮捕鱼》闪亮登场，经典捕鱼玩法，十万倍率满屏BOSS，金币狂爆不停。每天送金币，每周有活动，创意捕鱼玩法，升级养成分数比拼一战到底。
疯狂炮炮捕鱼 has achieved a Player Score of 66, placing it in the #9 spot for the best free Underwater games. Its score was calculated by analyzing a total of 424 reviews on Steam. This breaks down to a total of 295 positive reviews and 129 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play 疯狂炮炮捕鱼 on the Steam Deck (though some functionality may be limited).
10. Watertight
A short first-person horror game. An accident cripples your submarine while trying to find the wreck of the Titanic. In the darkness, you must restore life-support systems through tense puzzles, only to discover that you are not alone.
Watertight has achieved a Player Score of 81, placing it in the #10 spot for the best free Underwater games. Its score was calculated by analyzing a total of 182 reviews on Steam. This breaks down to a total of 163 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 | 8/25/2025 |
| Developer | Tiny Studio |
| Publisher | Tiny Studio |
| Steam App Id | 3858990 |
More Free Underwater Games
Explore even more rankings for the 100 best free Underwater games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 24 | 2/13/2024 | 78 | Free | Steam Charts | |
| 14 | 5/6/2026 | 83 | Free | Steam Charts | |
| 9 | 9/14/2023 | 88 | Free | Steam Charts | |
| 5 | 6/15/2025 | 46 | Free | Steam Charts | |
| 4 | 5/1/2026 | 78 | Free | Steam Charts | |
| 4 | 3/10/2020 | 78 | Free | Steam Charts | |
| 3 | 6/6/2025 | 64 | Free | Steam Charts | |
| 3 | 2/15/2024 | 69 | Free | Steam Charts | |
| 2 | 10/22/2021 | 66 | Free | Steam Charts | |
| 2 | 8/25/2025 | 81 | Free | Steam Charts | |
 | 2 | 10/1/2025 | 82 | Free | Steam Charts | |
 | 2 | 4/3/2026 | 84 | Free | Steam Charts | |
 | 2 | 6/3/2025 | 75 | Free | Steam Charts | |
 | 2 | 8/18/2025 | 82 | Free | Steam Charts | |
 | 1 | 3/22/2024 | 70 | Free | Steam Charts | |
 | 1 | 5/4/2020 | 73 | Free | Steam Charts | |
 | 1 | 9/16/2021 | 61 | Free | Steam Charts | |
 | 1 | 10/23/2024 | 71 | Free | Steam Charts | |
 | 1 | 5/8/2026 | ??? | Free | Steam Charts | |
 | 1 | 4/18/2025 | 73 | 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. (2026, April 3). Steam Store. Steam Store.
- Valve Corporation. (2026, April 3). Shrimp.io on Steam. Steam Store.
- Valve Corporation. (2026, May 10). SHRIMP GAME: KRILL CONFIRMED on Steam. Steam Store.
- Valve Corporation. (2026, April 22). IronWolf: Free Non-VR Edition on Steam. Steam Store.
- Valve Corporation. (2026, April 5). Dread Not on Steam. Steam Store.
- Valve Corporation. (2026, May 7). FincrementalOS on Steam. Steam Store.
- Valve Corporation. (2026, January 3). Aquarius on Steam. Steam Store.
- Valve Corporation. (2026, April 11). Infinite Blue on Steam. Steam Store.
- Valve Corporation. (2026, April 15). Pearls of Atlantis: The Cove on Steam. Steam Store.
- Valve Corporation. (2024, September 22). 疯狂炮炮捕鱼 on Steam. Steam Store.
- Valve Corporation. (2026, April 20). Watertight on Steam. Steam Store.