Online co-op Action-Adventure games

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

Showing 261–270 of 1,095 games matching Action-Adventure · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
75% of 4

Play as caveman with friend or many friend and explore strange new world! Survive against small lizard, big lizard, chicken lizard and big cat to find the Mungo Bungo! That mean great treasure in Unga Bunga language.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
77% of 109

A brotherhood in the shadows. A city on the brink. In the vacuum left by Shredder's demise, the Foot Clan's grip tightens on the streets you once called home. In the first-ever TMNT first-person action adventure VR game - forge your own chapter, solo or in co-op with up to three friends.

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$
Released
Price
$ · Cheap
Players
👥 Not stated

In "Descent Into Darkness", you must take an elevator down into the depths of a mysterious underground complex, filled with dangers and secrets. Your goal is to find a way out—but with each level, the darkness grows, and the threats become more terrifying...

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
91% of 12

Explore, survive, and terraform a barren artificial world. Build your base, reshape the environment, and uncover the hidden purpose of Tellus as life slowly begins to emerge.

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$$
Released
Price
$$ · Standard
Players
👥 1–5 players
Reviews
95% of 42

A chaotic co-op adventure for 1–5 players with a hint of 90s PC games. As new worker recruits, your mission is to explore, scavenge, craft, and eliminate. Loot everything. Be greedy. Contribute only what you dare to part with to grow your Hive. Warning: Goblins might perish in the process.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
72% of 79

Enter unstable rifts, survive otherworldly creatures, and grab bizarre ingredients to fuel a secret brewery hidden beneath a British pub. Hazard Levels is a 1–4 player physics-driven co-op survival horror where the deeper you go, the stranger it gets. Just make it back before last orders.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
61% of 36

Vahnora is a free-to-play 2D MMORPG with real-time combat, faction warfare, and a player-driven economy. Pick from 7 classes, capture relics across faction frontlines, climb the endless Infinity Tower, lay siege to the castle every Saturday, and forge your name into the leaderboards.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

A co-op horror game for up to 4 players where you explore abandoned facilities. Your mind can be plugged into random electric devices. Can you survive as a fridge? A vacuum cleaner? Scavenge valuable hardware and escape the terror.

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$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
95% of 32,114

Yee-haw, Cowboys! Team up in this chaotic 1-4 player co-op shooter. Journey to the Far Far West to blast monsters, sling spells, complete missions, and collect bounties. Work as a team to get in, get paid and get out (mostly) alive.

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Free
Released
Price
Free
Players
👥 Up to 8 players
Reviews
93% of 253

Ecto is a goofy lil game about jumping around in randomly generated nature worlds. Complete movement challenges, pick up frogs, unlock goofy items, or set time trial records against your friends. Play singleplayer or multiplayer up to 8 players.

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