Online co-op Investigation games

Every online co-op Investigation game on Steam we know of. Add tags, a price band or a review floor to narrow it down.

Showing 191–200 of 269 games matching Investigation, newest first · updated 13 Oct 2026

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Price
$$ · Standard
Players
👥 Not stated
Reviews
75% of 19,003

Welcome to Brighton! Join the police force of this fictitious American city and experience the day to day life of a police officer.

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Players
👥 Not stated
Reviews
56% of 58

In DarKnot, you’ll get to explore the streets of a foggy city, and exterminate the monsters within. Insidious opponents, dynamic battles, and challenging puzzles are waiting for you! Your fate is in your hands, the way you approach those challenges is up to you…

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 4

Step in the shoes of Mr. Holmes or Dr. Watson and venture on a journey filled with intrigue and mystery. Use your logic and teamwork skills in order to solve the mysterious murder which shocked the 19th century London. Play it with a friend on 2 devices with an open voice connection.

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Scelestum

Deck Playable
$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
66% of 3

Scelestum is a single or multiplayer mystery game. Solve puzzles and collect evidence of monster attacks, to identify the correct one which has attacked. Use various items and your own wits to uncover the truth of what is happening, and prove you have what it takes to be a monster investigator.

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USAC: Code Breach

Deck Playable
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Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
91% of 1,070

USAC: Code Breach™ is a unique coop experience set in a cyberpunk universe. As a special police unit, you and your partner are called in to investigate the unexpected shutdown of a high-tech research facility. Between reflection and action, you must survive a situation that is beyond you.

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Released
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$ · Cheap
Players
👥 Up to 4 players
Reviews
63% of 60

Dark Past is based on psychological horror by paranormal activity occurring during your investigations. Play solo or up to 4 players to try and solve the mystery of what entity is left behind.

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Released
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$ · Cheap
Players
👥 Not stated
Reviews
51% of 27

Explore atmospheric, spooky mazes. Bring tools with you to test evidence scattered throughout the mazes. Uncover the identity of the monster while avoiding becoming its next victim. Lay out a trap with the right bait to capture it or use your instincts to escape to hunt another day.

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−50%
$$
Released
Price
$$ · Standard · On sale −50% until 19 Oct
Players
👥 1–6 players
Reviews
65% of 69

Mad Experiments 2: Escape Room is the sequel of the award-nominated multiplayer escape game Mad Experiments. Alone or with up to 5 friends, follow the story of Hildegarde and Professor Cheshire, explore rich environments to find clues, and solve mind-bending puzzles to escape!

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Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
60% of 41

Phantom Hysteria thrusts you into the ghost hunting genre. Play solo or co-op with up to four players, where you will have to investigate, banish, and neutralize phantoms with your taped-together gear.

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