Online co-op Action-Adventure games

Every online co-op Action-Adventure game on Steam we know of. Add tags, a price band or a review floor to narrow it down.

Showing 1311–1320 of 1,516 games matching Action-Adventure, newest first · updated 13 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Up to 10 players
Reviews
70% of 79

This is a hard action adventure game for the modern warrior who survives in a harsh society, depicting the smoothness of soap, the stubbornness of defying it while cutting yourself, and the sense of unity with like-minded friends you meet along the way.

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JUNKPUNK

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Up to 5 players
Reviews
59% of 646

JUNKPUNK is a factory management, base building, exploration game where a New World Robotics ship has crash landed. You and any survivors must restore this ruined planet and prepare it for habitable life. Craft, build, explore, discover, and grow to terraform the planet.

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Piratopia

Deck Playable
Free
Released
Price
Free
Players
👥 Not stated
Reviews
83% of 1,049

Set sail in the open seas and plunder solo, PvE or PvP. Trade goods for ship upgrades or equipments to hunt the Kraken, all in the same Server. Dominate by yourself or with maties. Arrrr for free!

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

Biochemical Lost City is a "zombie" theme mobile game that combines gunfight shooting + RPG gameplay. This game perfectly integrates role-playing and shooting themes, not only keeps firepower during fierce battles, but also makes your operating experience more exciting.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
0% of 1

Warning!!! This Game Is Early Access!!!! Survive alone or with others in this Post Apocalyptic, Horror, Survival, Looter/Shooter with Base Building And Raiding. Join the community to watch this game grow and Get Exclusive Rewards and Content.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
63% of 87

Built from the ground up for PCVR, this action survival game combines detailed visuals, realistic physics, and a handcrafted, interactive, and destructible open world. Explore, fight, scavenge, and survive solo or in co-op with Flatscreen cross-play and the VR features players expect.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
50% of 16

SPACE TEK, Command, Construct, Collect! Space Tek is an exciting free to play online starship combat game. Players build their dream ships out of a range of unique blocks, and tailor their ships. Then put the ships to the test alongside or against players and Ai in a multitude of gamemodes!

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$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
89% of 7,391

At the close of the Iraq War, Special Forces hunting for weapons of mass destruction unearth something far deadlier – a buried Sumerian temple containing a nest of unearthly creatures. To survive the night below, they must forge a brotherhood with their enemies from the world above.

If you loved these, you'll love this