Best 4-player online co-op games

Online co-op games on Steam with room for 4 players, going by the player count on each game's store page. Games that don't say how many can play aren't included.

Showing 771–780 of 3,117 games matching 4 players, best rated first · updated 14 Oct 2026

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OxyRail

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 1–16 players
Reviews
80% of 1,097

Oxygen Train is an open-world survival train game. Wake up in a world lacking oxygen. Chop trees, mine, gather resources, upgrade your unique train. Survive by planting, fishing, farming, exploring, fighting. Build your train kingdom. Supports 1-16 online co-op.

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$
Released
Price
$ · Cheap
Players
👥 2–4 players
Reviews
90% of 43

A Cooperative Mystery Unfolds: In 1948, four investigators come together to find a missing priest, only to be trapped in a sinister space. Through teamwork, they uncover clues, echoes of their pasts, and mysterious notes signed in their names......

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$
Released
Price
$ · Cheap
Players
👥 Up to 10 players
Reviews
78% of 28,582

Zero Hour is a tactical FPS with online team-based game play that takes place in a variety of fictional locations interpreted in Bangladesh with Real-life scale & resource management. It brings a grounded, close quarter combat experience to the game.

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Line War

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players
Reviews
80% of 1,077

A new type of RTS with elements from 4X, Wargame, and Real-Time Tactics. Draw commands and execute a superior strategy to defeat your opponent, focusing on high-level decisions rather than constant micromanagement.

Keep Digging

Deck Playable
$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
79% of 2,943

Keep Digging is a digging survival craft game for up to 8 players. Explore a procedurally generated 5000m underground world, bring back ores, blueprints, and fossils, then use the smelter, forge, and enchantments to build your gear! Team up in co-op or compete for items in PvP.

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$$
Released
Price
$$ · Standard
Players
👥 2–4 players
Reviews
79% of 2,886

Foul Tyranids rampaging on barren worlds; the mysterious Aeldari waging war on the Imperium; a prophecy that could change the fate of an entire Sector. Purge the unclean with the new Tech-Adept Inquisitor and carry out the Emperor’s will in the grim Action-RPG “WH40k: Inquisitor - Prophecy”.

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Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
86% of 92

You are hunted by a rogue computer program. Avoid the bot either by yourself or cooperate with others while attempting to collect electrical components around the world to activate beacons to open the escape hatch.

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The Anomaly Project

Deck Playable
$
Released
Price
$ · Cheap
Players
👥 1–8 players
Reviews
81% of 534

Your goal is simple, spot anomalies to escape. Play alone or together with up to 8 players in online co-op. Make the right decisions to advance to the next level, or risk being reset to the beginning!

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Peekaboo

Deck Playable
−75%
$
Released
Price
$ · Cheap · On sale −75% until 23 Oct
Players
👥 Up to 16 players
Reviews
79% of 2,781

Peekaboo — Hide & Seek Online. Players are divided into two teams: props and hunters. Props take the form of objects and adopt their physical properties, and hunters are trying with all their might to find them.

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