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 321–330 of 352 games matching Mystery · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 4

After a catastrophic event in your country, survival becomes paramount. With dwindling food and water supplies, you must navigate a world filled with danger and uncertainty. Adapt to the ever-changing landscape and strive to survive in the face of overwhelming odds. Welcome to Infection Crisis.

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Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
69% of 23

Work together with a partner to solve a series of non-Euclidean Escape Room puzzles to uncover the mystery behind the vanished crew of Outpost Rhea, a deep-space research facility experiencing strange spatial anomalies.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
65% of 35

Phylakterion is a 1-4 player online co-op horror game in which you’ll enter different locations in search of a possessed vessel. Search, Identify, and Destroy the vessel and the entity inhabiting it – before the entity finds YOU!

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

iAlly is a mystery-action game that you can play alone or with 3 friends. Are you ready to feel like a time traveler by solving unique puzzles in a museum full of artifacts from the real world?

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
66% of 33

Survive Five Nights in Multiplayer co-op with real-time voice chat! Welcome to Megan’s Mall where your job is to uncover mysteries, find the truth, and survive by managing your power -- It's a summer job you will never forget!

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Free
Released
Price
Free
Players
👥 1–4 players
Reviews
54% of 22

In The Path to Memento Mori, players navigate eerie mazes in a co-op multiplayer horror puzzle game, solving complex puzzles and evading relentless monsters. Work together to uncover buried family secrets and unravel the chilling mystery that lies at the heart of the estate.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
100% of 6

Blood Red is a co-op survival horror game that can be played with 1-4 players. Figure out the demon and banish it using your special demon hunting kit!

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
83% of 37

Introducing Jewel Run, the ultimate multiplayer action game that puts a hilarious spin on burglary! Join the heist as two teams with distinct gameplay styles go head-to-head: Will the cunning thieves outsmart the magical orchard's vigilant guards, or will the guardians protect their treasures?

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
72% of 18

The year is 1440, and you are a priest that was brave enough to travel to the village of Rosenwood to cleanse the evil spirit (demon) that has been lurking there. . .

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
8% of 12

V gate; It is an open world game that includes first and third person shooter, survival, exploration, crafting, horror, thriller, team, building, mystery, management concepts and drags you towards different worlds with explorations.

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