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 71–80 of 352 games matching Mystery · updated 12 Oct 2026

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$ · Cheap
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👥 Not stated
Reviews
100% of 1

ASCENT OF ETERNITY™ is an action-rpg rogue-like magical horde-slaying projectile-hell third person coop game. Fire, Ice, Electric, Light, Dark, Metal, and Life. The 7 elements call for mastery. Master the elements and ascend through eternity!

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Price
$ · Cheap
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👥 Not stated
Reviews
34% of 38

A murder mystery blended with sudoku-style logic and weapons. Explore suspicious rooms, examine weapon evidence, and piece together clues through sharp deduction to reveal the killer. Play alone or work online with up to 4 detectives to solve the case together.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
33% of 3

A first-person card game where horror isn’t constant: it appears only when the match decides. For 1–4 players with real-time voice chat, over 900 dynamic events, cursed progression, and a final boss waiting for the challenge.

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Released
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$ · Cheap
Players
👥 Not stated

Another Slop Game is a chaotic medieval co-op platformer where you and your friends jump, fall, scream, and suffer through floating ruins, giant traps, stupid obstacles, and terrible decisions. Play solo or online with friends. Reaching the top is optional, losing your mind is guaranteed.

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$ · Cheap
Players
👥 Not stated
Reviews
100% of 17

Pogo Panic is a punishing parkour climb where you can play solo or co-op. Bounce on a pogo stick, burst a fleeting jetpack, and fight gravity through vertical sky courses with optional checkpoints. Turn them off for a full no mercy run.

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Released
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$ · Cheap
Players
👥 Up to 4 players
Reviews
69% of 13

Co-op horror investigation game across multiple maps. Enter procedurally generated environments, use your equipment to gather clues, and identify the entity. Watch your back, because monsters are hunting you down.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players

Co-op or solo sci-fi horror. Purge a biological outbreak with flamethrowers & grenades. Explore infested zones, grab keycards & stuff, then trigger the protocol to burn the Mother Organism. Team up. Erase the threat

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
42% of 7

Survive and evolve in the open world of Oratius. Build, craft, fight creatures, explore hidden locations, ride mounts, and progress from the stone age to modern tech — alone or with friends. Create worlds, complete quests, and uncover the secrets of Mak Survival.

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Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
75% of 639

Backrooms Lost Runners is a co-op survival horror with team play, voice-reactive AI, and immersive puzzles. This isn’t a “walking simulator”: explore liminal spaces, outsmart entities, and remember—even a whisper can give you away.

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