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 1001–1010 of 1,516 games matching Action-Adventure, newest first · updated 13 Oct 2026

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Snail Simulator

Deck PlayableCrossplay
−40%
$
Released
Price
$ · Cheap · On sale −40% until 23 Oct
Players
👥 Not stated
Reviews
98% of 1,287

Have you ever wanted to be a snail? Now you can be! Explore the vast Snearth with snail friends! Join monthly Snail Parties! MMOS (Massive Multiplayer Online Snails)! BECOME a snail (in a simulation)!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
60% of 35

Hand Simulator: Aliens is a multiplayer game where your mission is team survival. You either battle infected colleagues, saving the ship and crew, or sow chaos and death as an infected member.

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Cave Digger 2

Deck PlayableCrossplay
$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
64% of 14

Go on a mysterious journey in the wildlands in this 1-4-player action-adventure game inspired by Western, Dieselpunk and Lovecraftian themes. Explore old mines, nautical caves and ruins of ancient civs to unravel the secrets of the valleys. But beware! Best to keep a 6-shooter close just in case.

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SUPER CRAZY RHYTHM CASTLE

✓ Deck Verified
$$
Released
Price
$$ · Standard
Players
👥 Up to 3 players
Reviews
78% of 384

It’s Super Crazy Rhythm Castle, the chaotic rhythm adventure! A puzzling co-op mashup unlike anything you've ever heard. Solo, or with a band of up to three friends … … Can you conquer the castle?

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
69% of 232

A grinding medieval fantasy life sim with a detailed complex crafting system complemented by survival and RPG elements. Grind resources, craft items, trade with locals, master professions, fulfill quests and explore the world to uncover its long-lost secrets.

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Under A New Sun

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
76% of 384

While searching for a new home, an unexpected failure in your ship has left you stranded on a planet surprisingly similar to Earth. Discover a vast open world, hunt for food, develop technologies, and build yourself a new home to survive!

If you loved these, you'll love this