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 171–180 of 352 games matching Mystery · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
40% of 5

You wake up in a giant techno-complex that has survived a catastrophe. You are surrounded by mutants, hostile systems, and endless railways between modules. With no memory and no chance of help, all you can do is search, survive, and try to understand why the entire complex is trying to erase you.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
53% of 82

A 1-4 player co-op horror game where you must outsmart a monster that adapts to your every move. Enter a volatile Rift with shifting maps and objectives, scavenge rare resources, and extract together… or betray your friends for the lion’s share of the loot.

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$
Released
Price
$ · Cheap
Players
👥 1–6 players
Reviews
100% of 3

A roguelite 1-6 player Co-op top-down dungeon crawler. Slay mobs, loot chests, explore the map, craft wands and upgrade spells in a team attempt to escape from the magical dimension by conquering all 4 seasons.

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

4-player online co-op horror game set in procedurally generated abandoned mines. Investigate, restore power, and survive as you face a monster with unique forms, using equipment to complete objectives and refine your strategy.

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Free
Released
Price
Free
Players
👥 Up to 2 players
Reviews
92% of 198

🐱 Discover 100 hidden cats 🌍 in handcrafted scenes that capture the spirit of each country. Relax with color-by-numbers 🎨 and bring illustrations to life. Play solo or in cozy co-op 👯‍♂️, while Meow FM 🎶 sets the mood.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
77% of 27

A strategic multiplayer tower defense game where players build synergistic towers, trade resources, and coordinate with teammates to overcome challenging enemy waves.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
85% of 60

They See Us is a multiplayer horror game built for creepy vibes, scream-worthy jump scares and hilarious co-op tension. Work together to spot terrifying anomalies lurking in familiar places – before they find you!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 4

A co-op horror about investigating and recording aliens. Turn in your recordings to the Colony for a reward. You keep the recordings you make whether you die or survive.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
86% of 1,800

Nine Streamers enter an ancient Chinese mansion, hoping to attract a huge following and become famous through livestreaming. However, two of them are tragically possessed by evil spirits. These possessed will slaughter their companions, and complete a malevolent ritual of a ghostly wedding.

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