Online co-op Investigation games

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

Showing 101–110 of 178 games matching Investigation · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
66% of 3

Deep Dark Space is a Phasmophobia-like 4-player online co-op horror experience set in space. Explore abandoned stations, gather clues, and uncover the monster lurking in the dark. Trust no one — paranoia runs high as hidden betrayals threaten your survival.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
81% of 580

"Bureau of Contacts" - ghost-hunting game for 1-4 players, in which you'll encounter 2 enemies at once - location itself and the ghosts with most human-like intelligence ever. So...look around and watch what you say!

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$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
69% of 373

Unpossess is a 1-4 co-op exorcism simulator game set in the early 1900s. Players take on the role of exorcists responsible for addressing cases of human possession.

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$$
Released
Price
$$ · Standard
Players
👥 3–6 players
Reviews
50% of 4

NMO is a thrilling multiplayer (3 to 6 players) game where one player, the impostor (Ox), lurks in the shadows to deceive and neutralize the Operators, while others take on the role of Operators, working independently or cooperatively to identify and eliminate the Ox hidden among them.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
0% of 2

This open-world survival crafting game puts you, an amnesiac protagonist, on a journey to rediscover your true self. Explore islands and oceans, crafting weapons, watercraft, and shelters to survive. Face threats as you uncover the mysteries of your past and reclaim lost memories.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 2

Gather your best mystery solving friends or go in alone in this VR Escape Room game, that features both singleplayer and multiplayer with VR cross platform support. Can you uncover the secrets of the professor and escape?

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
53% of 13

Experience the horror puzzle game, Envious, offering both single player and co-op modes. Choose to be Xavier or Xandra where the first is trapped in a house, trying to escape it, while Xandra explores a separate old house to uncover clues facilitating Xavier's escape.

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