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 331–340 of 352 games matching Mystery · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
35% of 306

In this multiplayer horror game, a loving couple receives an invitation from a wealthy man for an event. Despite my concerns, she insists on going. To protect her, I decide to secretly join and keep her safe.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
85% of 14

Welcome to Poly Backrooms, an unique multiplayer co-op horror game that combines the infamous backrooms creepypasta with a fun, low-poly aesthetic. With up to 4 players, you and your friends will navigate through the backrooms, solving intricate puzzles and avoiding dangerous entities.

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
81% of 4,014

Partner up with your friend online and set sail for an unforgettable puzzle adventure in this bite-sized standalone We Were Here experience. Work together to overcome brain-teasing challenges and make fun memories, using your best communication, teamwork and trust skills.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
33% of 21

Alien investigator is a 4 player online co-op horror game. Join a team of investigators and use all your alien expert equipment to gather as much evidence as you can. Learn extraterrestrial facts based on photos, videos and real life eyewitness accounts.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
80% of 77

Two minds. Two perspectives. One solution. Step into a cooperative puzzle experience where you and your partner see different sides of the same world. Communicate, connect the clues, uncover the truth.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
50% of 12

The Hunted is a horror-themed exploration and survival game. Months after the disapperences of several people, you are determined to document the fates of the missing, reveal the truth and clear your name. However, a huge, powerful beast lurks within the woods.

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$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
55% of 391

Dream Sketcher is a 1-4 player investigative adventure game. As an investigator of the special agency Dreamland Security, you will form a team and enter the weirdest dreams to conduct brain-diving investigation. Danger is imminent, investigate, make choices, roll the dice, and fight!

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