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 111–120 of 178 games matching Investigation · updated 12 Oct 2026

Filters: Investigation × Clear all
$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Turn the undead restless as you recklessly disturb their place of rest. Invite yourself and your friends into the homes of scary ghouls in hope that you can return safely and earn your minimum wage ghost hunting reward to feed your loved ones.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
78% of 19

A game that blends exploration and adventure , offering two modes. In the dynamic RPG mode, players confront powerful bosses and equip weapons and armor to build their strength. In the solo platformer mode, players navigate treacherous environments filled with obstacles to reclaim lost powers.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
69% of 100

Dustland is a reimagined take on the survival genre. A world where expeditions, looting, and battles are just the tip of the iceberg, hiding secrets and mysteries of a fallen region in its depths.

$
Released
Price
$ · Cheap
Players
👥 Not stated

Escape From Pine Mountain is an online asymmetric horror game where players, as members of the Critical Crime Scene Unit, investigate eerie cases in Pine Mountain. Host players can choose to be the killer, adding suspense. Navigate tense environments, solve mysteries, and fight to survive.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
30% of 10

We Are Alive is a Co-Op horror game, that can be played with at least 1 and up to 4 players. You are a detective and your mission is to investigate the old psychiatric hospital and find out the truth. Your standard equipment is a flashlight and a gun.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
27% of 131

"The Cursed Hour" is a cooperative survival horror game where players explore a haunted mansion to find cursed relics and exorcise the supernatural. With every wrong move, the ghost gets more aggressive, forcing players to work together before fear and darkness consume them.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
16% of 6

Open-world, online multiplayer ghost hunting game that plunges you into a vast and eerie world filled with haunted locations waiting to be discovered. Whether you're braving the darkness alone or teaming up with friends, your mission is to identify the terrifying entities lurking within this world.

If you loved these, you'll love this