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 801–810 of 1,516 games matching Action-Adventure, newest first · updated 13 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
66% of 308

Summon: Joint Escape is a cooperative horror survival game for 1-4 players. Find a way to escape from a stalker in camouflage uniform who wants to give you a piece of paper with the inscription "Summon".

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Reconquer Online

Crossplay
Free
Released
Price
Free
Players
👥 Not stated
Reviews
60% of 43

An new indie MMORPG inspired by OSRS! Train, battle, quest, and explore a dynamic world. Solve puzzles, conquer dungeons, and fight epic battles. This game builds upon time-tested mechanics with barricades, fires, player controlled resources, endless raids, macroing, and a caravan system!

Throne and Liberty

Deck PlayableCrossplay
Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 68,958

Throne and Liberty captures the essence of classic MMORPGs while introducing new gameplay elements, depth and excitement at every turn. Gather your guild, prepare for battle, and set forth for throne... and liberty!

Free
Released
Price
Free
Players
👥 Not stated
Reviews
86% of 287

With core of Dungeons battle, upgrade Battle Talent's combat thrills, this co-op game brings you into VR Minecraft world to explore the unknown!Epic boss battles, rich weapons & avatars, get full game Pixel Dungeon VR and be ready for more epic dungeon adventures!

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Start Over

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
60% of 325

Embark on an unpredictable survival journey in Start Over. Solo, co-op, online, explore diverse landscapes, craft through 4 tech tiers, encounter wildlife, and trade or raid for resources. Choose your path, defend against waves, and shape your destiny in a dynamic world. Are you ready to Start Over?

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
57% of 71

Players can obtain materials and exchange them for corresponding characters, costumes, weapons, actions, etc. Supports body adjustment, taking photos, scene scanning, player chain connection.All multiplayer online. Currently in the early access most Unreal the scene will be changed later.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 4

A Dungeon Crawler that you can play alone or with your friends in online co-op. There's also Arena Mode where you can fight against other players in online pvp.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
41% of 17

The game adopts a real-time combat system, allowing players to choose to join the navy or pirate guild, presenting a legendary life of the navy fighting against pirates. The game has a rich trading system.

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9th Dawn Remake

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
86% of 516

Rediscover the magic of the 9th Dawn series with this complete re-imagining of the original game. Venture into a massive 2.5D open world. Explore 45 new dungeons in single-player or online/local co-op, craft weapons, raise pets, play a deck-building card game, and take down the Castle of Maltyr!

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$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
72% of 11

Deja Vu portrays The Backrooms as a manifestation of mental illness. Join forces with up to four friends and endeavor to escape the confines of both your own mind and the mundane existence that led you here.

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