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 11–20 of 352 games matching Mystery · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
53% of 247

Play as Agent Eva to follow the trail, or as Analyst Miles to manage the operation. Dual Protocol is an asymmetric noir puzzle game where two players progress only through conversation. Without seeing each other’s screens, combine the data you have and uncover the truth behind the Castellari murder.

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

A 4 player co-op survival horror game where every step into the house uncovers a darker truth... Who will you trust: the dead, or your partner, your choice matter, including the hidden Astral Realm. - Or go solo and Complete what your started!

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
91% of 24

A 2D pixel-art ghost hunting horror game, solo or in online co-op for up to 4 players. As a hunter for a mysterious corporation, you collect and analyze cursed artifacts to identify the ghost before its anger turns into a deadly hunt.

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$
Released
Price
$ · Cheap
Players
👥 2–4 players

Explore limbo in 2 to 4 player co-op, gather soul fragments, try to escape. Each failure forces the group to sacrifice one of their own, who returns to hunt you and sabotage your escape. The more you fail, the more hunters stalk you. How many of you will make it out?

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$
Released
Price
$ · Cheap
Players
👥 4–15 players
Reviews
100% of 21

Social deduction game for 4 to 15 players. 3 factions clash as you fortify the village and master unique roles. Uncover your enemies before the Blood Moon turns against you, or be devoured.

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$
Released
Price
$ · Cheap
Players
👥 2–4 players
Reviews
0% of 1

Shuffle and Seek is a 2-4 player party game of memory and mischief! You split into two teams: one secretly rearranges everything in the room, and the other tries to figure out exactly what changed.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
74% of 706

这是一款双人合作类的互动影游。两位玩家分别扮演「秘密特工」与「商界之女」,经历一场充满挑战与救赎的冒险。1941年的上海孤岛,金融界的血案,各怀鬼胎的多方势力。你们的选择将共同影响故事走向,一起开启专属你们的乱世迷局。

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
77% of 49

A 1-4 player co-op horror and hunting game. Descend into an anomaly-filled underground to collect rare lure stones, return to the surface and use your Lure Gun to draw zombies in and hunt them. Kill, sell, upgrade. Survive below, hunt above.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
67% of 65

Do you love ghost hunting with friends? Do you love the thrill of a crucifix burning in your hand as you exorcize ancient spirits? Do you wish you could become a ghost yourself and scare your fellow hunters? Well, then SO BELOW is for you.

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