Online co-op Underwater games

Every online co-op Underwater game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 1–10 of 53 games matching Underwater · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 3

Dive into an unforgiving underwater nightmare alone or with friends! Complete deadly missions for the Union in the terrifying depths of Gornak. Repair broken pipes, replace defective equipment, and gather scattered body parts to pay off your debt... if the local fauna doesn't get you first.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
52% of 90

主打专业台钓的写实多人钓鱼沙盒。还原滑漂、飞铅、跑铅实战钓组,单人野钓、组队垂钓、大型联机赛事模式齐全。数百种真实生态鱼种,鱼塘繁育、自定义赛事规则,永久免费持续更新内容。

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
65% of 23

A few logs, one harpoon, no land in sight. Pull driftwood from the sea and build your raft into a floating town, on your own or with friends you invite straight from Steam. Dive to the ocean floor. Raiders come at night, sharks circle, and somewhere out there, a leviathan is waiting.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 6 players
Reviews
89% of 100

SHRIMP GAME: OVERKRILL is a solo or multiplayer third-person shooter RPG set in an abyssal realm. Pilot your SHRIMP platform to fight giant sea monsters, master elemental classes, and unearth secrets in a 6-person co-op campaign, or just krill your friends in multiplayer PVP!

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$$
Released
Price
$$ · Standard
Players
👥 1–5 players
Reviews
74% of 242

Deep Blue Sushi is a casual 1–5 player co-op adventure where you explore the ocean, catch fresh fish, prepare sushi, serve customers, and grow your restaurant while uncovering the secrets of the mysterious Deep Blue.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Become a shark and rule a living, physics-driven ocean! Hunt, survive, and team up with friends to take down bosses, collect loot, and customize your look. You'll be amazed at what you can do with a mouth full of teeth. Play flat-screen, VR or cross-platform with your friends on the Meta Quest.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 1

Fish Companions is a relaxing idle game that brings colorful life to your desktop. Adopt your own digital fish to keep you company. Raise your companions, unlock aquariums, explore new oceans filled with more fish, and collect them all! Hang out with your friends to enjoy even more companionship!

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Free
Released
Price
Free
Players
👥 2–4 players
Reviews
80% of 10

A cheerful, free 2D platformer where animal pals hop, bounce, and race across colorful worlds. Cross-platform online multiplayer on Windows, macOS, iOS & Android — plus local couch play and solo runs. Family-friendly, easy to learn, tricky to master.

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