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 271–280 of 352 games matching Mystery · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
41% of 170

Experience a short co-op Escape Room set in the Malum universe. Trapped in an atmospheric horror house, you and your team must solve puzzles to escape. Will you make it out alive?

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 1

is a thrilling action-adventure game where you play as a space explorer stranded without fuel. Using a portal, you travel to another realm to collect and sell trash to refuel your spaceship.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
45% of 22

A 4-person co-op horror game where teamwork is the key as players face malevolent demons in a mysterious mansion. An immersive experience with unpredictable AI that continuously changes and adapts to the players’ behavior. Can you conquer your fears and escape?

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
33% of 278

Demonsomnia is a CO-OP multiplayer bodycam horror game focused on the impact of nuclear reactions. Radiation has spread everywhere, so put on your gas mask. Your goal is to activate the nuclear reactor device and escape without being caught by mutants.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
45% of 24

Solo or CO-OP with friends, survive the siege and keep your vessel afloat in “SHARK SIEGE - TOGETHER SURVIVAL” where the deep blue sea is your adversary, and courage is your strongest ally. Join the voyage, if you dare!

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
0% of 2

"Whisper of the Curse" is a 4-player online co-op psychological horror game where you and your team will perform various rituals and spells to eliminate the curse and fend off cursed entities. At the same time, you'll need to avoid being hunted by these malevolent entities.

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$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
89% of 280

"Escape Memoirs: Safe House" is a co-operative reverse escape-room puzzle game. You are a member of a criminal organization who must break into one of their own safe houses to fetch some important tools. Do you think you have what it takes to overcome the puzzles that stand in your way?

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Free
Released
Price
Free
Players
👥 1–4 players
Reviews
88% of 6,259

Dark Hours: Prologue is a free co-op survival horror game for 1-4 players. Your heist has been disrupted by a supernatural event, and your team of robbers is now trapped with a monster. Forget your plan, your mission: survive! Explore and cooperate to find a way out or hide and wish for daylight.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
69% of 175

Silent Rain is a challenging and immersive co-op horror game, for 1 to 4 players. Explore abandoned locations, solve puzzles, and gather information while trying to survive the threats lurking in the dark. How many tries will it take you to master your fear?

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