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 291–300 of 352 games matching Mystery · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 3–8 players
Reviews
82% of 23

"Where is Paradise?" is an party multiplayer game for 3 to 8 players. Dive into purgatory in search of Paradise, but beware of corrupted souls trying to stop you. Form alliances, thwart their plans, and discover who can truly be trusted. Ready for the challenge?

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
67% of 77

🏰🐉🧙‍♂️🧝Embark on an epic journey in World of Solaria, the ultimate free-to-play 2D pixel MMORPG! Join forces with players worldwide to conquer foes, master skills, and unearth hidden artifacts. Craft your destiny, engage in PvP battles, and shape Solaria's destiny in a dynamic economy.

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$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
28% of 7

Dive into an adventure, alone, with your friends or play with random people. Solve various puzzles and overcome all the traps. There are currently 5 different rooms in which you can prove yourself. More and more rooms will be added in permanent updates. I hope to see you on the other side.

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$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
92% of 367

This is a Ghost is an FPS psychological horror and investigation game for 1 to 4 players. Track down supernatural activity, identify demonic entities using specialised equipment, and banish them with crafted ammunition in solo or online co-op!

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
48% of 3,132

Play as the New kid in South Park and join Cartman, Stan, Kyle, and Kenny, in three-dimensional glory, to celebrate the most magical day in any young child’s life - a snow day!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
30% of 13

"The Liminal Space" is a thrilling horror adventure game. Explore surreal landscapes, solve puzzles, and escape from terrifying monsters. Are you ready to face the challenges? Enter "The Liminal Space" now! ROADMAP

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
60% of 40

BEAMS — a challenge for the brave! Can you unravel the mysteries of hidden cartridges? Each one is a portal to a unique world filled with insane mini-games where laughter meets terror. But remember: only the most attentive and determined will find all cartridges and uncover their secrets!

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