Online co-op Mystery games

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

Showing 181–190 of 352 games matching Mystery · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
81% of 11

Purchase persistent land quadrants, build RTS-commanded drone bases, extract resources, and defend against trespassers in this PvEvP extraction sandbox. Upgrade through Ownership to Legacy, automate mining fleets, and grow your empire across the Americas. Your land, your legacy.

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Free
Released
Price
Free
Players
👥 Up to 2 players
Reviews
90% of 273

🐱 Discover 100 hidden cats 🌍 in handcrafted scenes that capture the spirit of each country. Relax with color-by-numbers 🎨 and bring illustrations to life. Play solo or in cozy co-op 👯‍♂️, while Meow FM 🎶 sets the mood.

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$
Released
Price
$ · Cheap
Players
👥 Up to 6 players
Reviews
70% of 305

A heart-pounding and hilarious horror party game set in a pitch-black mansion. Armed with a flashlight, a revolver, and proximity chat, you and up to five friends sneak, shout, and stumble your way through tense shootouts, chaotic traps, and total darkness.

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$
Released
Price
$ · Cheap
Players
👥 Up to 3 players
Reviews
42% of 7

Operation Dimera is a co-op game for up to 3 players where you and your friends must save the world. Tackle diverse missions. Work together to solve puzzles that stand in your way and customize your weapons to be ready for anything! The fate of the world is in your hands!

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Free
Released
Price
Free
Players
👥 Up to 2 players
Reviews
90% of 217

🐱 Discover 100 hidden cats 🌍 in handcrafted scenes that capture the spirit of each country. Relax with color-by-numbers 🎨 and bring illustrations to life. Play solo or in cozy co-op 👯‍♂️, while Meow FM 🎶 sets the mood.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
100% of 4

The Storyteller is an indie game developed by a single person, where one player becomes the storyteller narrating mysterious tales, while others attempt to unravel unexpected solutions. A multiplayer experience blending suspense and questionable humor.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
83% of 694

Backroom Company (aka Axiom Corporation) is a mysterious group exploring “Noclip.” No one knows who created it. Follow the missing explorers' traces and find strange items deep in the Backrooms.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 322

Explore familiar stories with Sherlock Holmes! Solve mysteries, find hidden objects, and play match-3 puzzles to restore classic tales. Join clans, take part in events, and uncover secrets across hundreds of detailed levels — the magnifying glass is in your hands!

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