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 201–210 of 1,095 games matching Action-Adventure · updated 12 Oct 2026

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Reviews
75% of 639

Backrooms Lost Runners is a co-op survival horror with team play, voice-reactive AI, and immersive puzzles. This isn’t a “walking simulator”: explore liminal spaces, outsmart entities, and remember—even a whisper can give you away.

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$ · Cheap
Players
👥 1–8 players
Reviews
70% of 113

A chaotic co-op survival game for 1–8 players where you travel the trail, manage supplies, survive disasters, and argue with friends. Work together to keep the wagon moving, adapt to random events, and try to make it to the end in one piece.

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Players
👥 1–6 players

Co-op horror for 1-6 players. Play as Japanese high school girls, collect Obscure and survive! ⚠️ ALPHA: Very limited content. Buy only to support the project, test core mechanics and give feedback. Otherwise, wait before buying! The story mode is not yet available.

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Players
👥 Not stated
Reviews
40% of 64

You are bound by a chain — every step matters. Break the Chain is a physics-based solo and co-op puzzle game where precision, timing, and teamwork are everything. One mistake can pull everyone down. Fall, restart, and fight your way to freedom.

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Players
👥 Up to 4 players
Reviews
81% of 291

Dig, build rails, and survive underground as a Goblin miner for WHAAG MINING INC. Light your path or the darkness will drain your life. Explore fully destructible biomes, fight hostile creatures, and hunt the legendary Giant Crystal, solo or online co-op

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👥 Not stated
Reviews
78% of 11,011

"Lost Castle 2" is a 2D Beat'em up Rogue-Lite game. Explore abundant treasures and items to enhance yourself, master various weapons to showcase your skills, and challenge powerful monsters to demonstrate your strength. A new adventure is calling for treasure hunters!

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👥 Not stated
Reviews
55% of 814

Explore alien worlds and launch Offensives against the Void as a member of the ESS Starseeker crew. Embark on timed Expeditions to investigate alien flora and fauna, upgrade your gear, and complete missions to save the Universe.

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Released
Price
$ · Cheap
Players
👥 Up to 6 players
Reviews
83% of 4,881

An online Co-op game about breaking into houses and causing havoc as a tiny gnome. Avoid danger, repurpose stolen household items, and complete tasks to meet the High-Gnome’s demands. Craft equipment and upgrade your home to make your missions easier and more successful.

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Players
👥 Not stated
Reviews
82% of 1,919

Step into the ultimate open-world witch adventure. Befriend and battle creatures, and conjure up a sanctuary alongside other witches in co-op or single-player.

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Released
Price
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Players
👥 Up to 4 players
Reviews
100% of 2

Mudventure: 4-player co-op survival on shifting 3D mudflats. As a cute mole, dig for resources and repair your ship. Use terrain transformation to carve paths, explore caves during real-time tides, and defeat 5 giant bosses. Escape with friends before the sea swallows the island!

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