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 81–90 of 352 games matching Mystery · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 4–8 players
Reviews
100% of 2

Live market data, real-time trading, 4-8 player multiplayer. Each day, the player with the lowest assets is eliminated. An insider who knows everything is hidden among you. Try to find them. Who is the real stock market legend? Come find out.

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$
Released
Price
$ · Cheap
Players
👥 Not stated

A sci-fi RPG strategy game where you build fleet, attack, trade and explore space. You can fight yourself, have others help you and upgrade your ship or buy plethora of ships for your space garage.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 10 players
Reviews
100% of 1

Project Microchip is a social deduction game for up to 10 players. Complete objectives and escape as a Survivor, or become an Infected, hide your identity, earn the group's trust, and strike at the perfect moment.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
71% of 87

Work together to escape the manor in "Trapped Together", a narrative co-op puzzle campaign where logic reigns and death is not an option. Communicate, trade items via dumbwaiter, and solve intricate riddles.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
100% of 3

Dang Darn Island is a 1-4 player co-op roguelike adventure. Explore the procedurally generated island, delve deep into the temple, smash pots, dodge traps, and see if you can escape with the Gold Idol before the angry volcano loses his temper!

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 5

🐱 Discover 900+ hidden cats across 9 unique hand-drawn country maps 🌍. Relax with guided color-by-numbers 🎨 or free pastel coloring. Play solo or online co-op 👯‍♂️, while Meow FM 🎶 sets the mood.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
100% of 8

Violet Mansion is a horror puzzle game where you and your friends must survive against various enemies by using absurd items, finding creative solutions... and pushing people down stairs. Or you alone get to uncover the story of two friends who made a promise.

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$
Released
Price
$ · Cheap
Players
👥 1–6 players
Reviews
0% of 1

An online co-op horror game for up to 6 players. Scavenge dangerous, abandoned environments for valuable loot to meet the Company's strict profit quota. Survive unpredictable monsters, manage your gear, and work together to escape alive.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
65% of 1,110

Thick as Thieves is a stealth-action heist game, playable solo or with a partner in crime in co-op multiplayer. Master the art of thievery through cunning gameplay across a 4-hour campaign in this dynamic new take on stealth.

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