16 Best Free Co-Op Games On Steam

Updated on October 11, 2026, by Mark Sammut: I've updated the article with a new game (Amiino), images, links, and an intro.

Free co-op games on Steam often go by unnoticed, unless they feature massive open worlds and base-building. We all love to join our friends for a session of Split Fiction and Baldur's Gate 3, but gaming has gotten so expensive that everyone should be trying to take advantage of every cost-saving measure, and Steam has enough free-to-play games to keep your group busy for a very long time.

Besides covering every genre known to humanity, these co-op games cover different group sizes, so you can enjoy a 3-player outing with your siblings or join your friends for an 8-player romp. As I know that picking a place to start can be challenging, I've put together a list of Steam's best free co-op games, with variety being the focus. Hopefully, everybody finds something that suits them.

Disclaimer & Criteria

We'll largely ignore co-op games that focus exclusively on PvP. Counter-Strike 2 and Rainbow Six Siege X are examples of omitted games, although modes like Wingman can satisfy players looking for PvP co-op. That said, we will include a few exceptions, especially new games that you might have missed.

Also, for online co-op games, we are going to avoid Steam games with low player counts that are either dead or dying.

1 Aniimo Has Co-OP, But It Isn't The Main Selling Point

Catch Creatures With Your Friends

I'm only including Amiino for a month or two for visibility's sake, and I'll remove it once its launch window is far in the review mirror. Don't get me wrong, this Pokemon-esque open-world romp isn't bad by any stretch of the imagination, but it feels designed primarily around single-player, with co-op acting as a secondary feature. There's nothing wrong with that, but if you are looking for a story mode to play with friends, you won't really find it here.

Set on the continent of Idyll, Amiino drops you in a gorgeous world as a Pathfinder for an expedition team, and your goal is to study and catch all sorts of creatures (called Amiino). The game has both main and side quests, and you level up and level your Amiino, along with engaging in standard mechanics like base building. As tends to be the case with these creature collectors, the story isn't really the focus and most serves as a backdrop for your exploration.

So, what about the co-op? Well, Amiino allows up to four players to join the same server, where they can catch monsters, open treasure chests, and fight Alphas. All of that is standard stuff that you would expect, but there is one catch: only the host advances quests. Everybody else will have to replay the quests in their own time, which can make things a bit tedious. Consequently, co-op is at its best when everyone is basically done with the story, or the group agrees to just explore and see the sights.

2 Wires And Whiskers Is Adorable And Charming

An Impressive Local Co-Op Student Game

Before getting to the heavy hitters, I wanted to kick things off with an indie student project as an example of Steam's hidden treasures. Wires and Whiskers is a short local co-op game that lasts for well under an hour, and it is at most a two-and-done. While it might not last long, the game makes the most of every second, delivering asymmetrical gameplay that could easily serve as the foundation for a much longer campaign.

The two players control wildly different characters: one takes charge of a gerbil, and the other an exosuit. The former emphasizes platforming and melee attacks, while the latter has a long-range weapon and magnets to manipulate the environment and solve puzzles. A simple set of moves for both characters, but they handle well and are different enough from each other to potentially warrant two playthroughs.

Not every game needs to keep players busy for weeks or months; sometimes, all it takes is a fun session. Wires and Whiskers gives you that.

3 Spiral Knights Is A Legendary Free Co-Op Game

A 2011 Co-Op Game's Resurgence In 2026

Weirdly enough, Spiral Knights might be the most exciting free Steam co-op game of 2026 so far, despite being more than a decade old and spending years as a walking corpse. In late 2025, Grey Havens began supporting the game more intensely, leading to a steady stream of new content and events throughout the current year. The community repaid this effort with a fairly big spike in activity, returning the game to something that resembles its glory days.

Don't get me wrong, Spiral Knight isn't anywhere close to being one of the most popular games on Steam, and it rarely cracks 500 active players; however, for a project this seasoned, those numbers should not be scoffed at.

An MMO that plays like an isometric hack-and-slash action RPG, Spiral Knights absolutely shines in co-op, to the point that I am hesitant to recommend it to people who want to play entirely solo. Fortunately, you don't need real-life friends; you can instead team up with strangers in a public party. Although relatively simplistic, the gameplay is fun, flashy, fast-paced, and rarely wastes a minute. Dungeon runs are an absolute blast, and the endgame largely revolves around completing these adventures to unlock new cosmetics.

4 We Were Here Is The Free Game That Launched A Franchise

Best Free Escape Room for 2 Players

Following the same thread as innovative puzzle co-op games like Keep Talking And Nobody Explodes, We Were Here sees two players lost in a frozen wasteland and separated. Their only way to communicate is through handheld radio devices. Both players must have working microphones to communicate as they work together through challenging puzzles to reunite, and they will have a unique gameplay experience.

Seemingly inspired by real-life escape rooms, I was surprised by how well We Were Here replicates those experiences. The game proved successful enough to produce four sequels, none of which are free. That said, they are all very good and are not that expensive when bought together.

Looking for other free games? Then check out the following titles, which are all temporarily free on sites like Steam.

5 Garisani Detective Agency Challenges You And A Friend To Solve Crimes

A Puzzle Mystery Game Designed For Co-Op

When it comes to free indie games, you kind of have to go in expecting some rough edges, and Garisani Detective Agency requires that approach. Polarion's co-op-only game follows two siblings as they investigate cases in 1990s Korea. A Korean dev team designed the game, and the English translation leaves something to be desired. Although it has other elements, this is ultimately a puzzle mystery game that requires you to find clues and utilize your deduction skills, and the uneven translation can hinder that process to an extent.

Still, even with these issues, Garisani Detective Agency still shines through as a charming adventure with a fun co-op dynamic. Although a few puzzle aspects can be confusing, most follow a logical path and can be solved, even if they require a bit more brainstorming than usual. The story isn't bad either, and the sibling dynamic is amplified by the fact that one of them is dead.

Oh, did I not mention that? Yeah, one player controls a ghost.

6 Supermarket Together Is Absurdly Fun, Solo Or With Friends

Massive 16-Player Management and Cooperative "Broom" Justice

Since the tail end of 2024, Supermarket Together has quietly existed as one of Steam's best online co-op experiences, and it is genuinely free except for a cosmetic pack. As its title implies, this game should satisfy any player's desire to build their own retail empire, specifically by managing a grocery store. They can take on this responsibility alone and still have a good time, but bringing a few friends along is recommended.

Don't let the relatively simplistic visuals fool you; Supermarket Together has a lot going on. Not only can players manage every aspect of the story (or dish out tedious jobs to employees), but they can also expand using Franchise Points. The game has a surprisingly good sense of progression, and it adds new content regularly.

7 Alien Swarm: Reactive Drop Improves On Valve's Forgotten Shooter

Best for Large Groups: Free 8-Player Tactical Action

Alien Swarm might just be Valve's most forgotten game, although the 2010 release is by no means bad. In fact, anyone seeking a twin-stick co-op shooter can certainly do worse than this title; however, they should consider jumping into Alien Swarm: Reactive Drop instead of the original game. For one, Reactive Drop is still being updated despite coming out in 2017, which isn't true of Alien Swarm. Second, and more importantly, the expansion does exactly what it advertises: it improves the base experience.

While not lacking PvP, Reactive Drop is primarily about co-op. 8 players can take on one of the game's 10+ campaigns, each consisting of a couple of missions. Naturally, the gameplay loop boils down to players going up against wave after wave of enemies while they try to work toward a level's endpoint. Straightforward as this concept is, Alien Swarm: Reactive Drop manages to incorporate quite a bit of nuance through its classes and tactics-driven gameplay.

This isn't one of those forgiving games that lets players effectively disregard the rest of the team as they live out their Rambo fantasy; no, teamwork is necessary for survival.

8 Where Winds Meet Has A Whole World For Multiplayer

Best for: Massive Open-World Exploration and Wuxia Combat

What a time we live in that something as impressive as Where Winds Meet would be free-to-play. While it has been out in China for a while, Everstone's open-world RPG is finally available internationally, and it covers a surprisingly wide net.

If you want to play Where Winds Meet as a single-player experience, you can do so without having to worry too much about interacting with the MMO features. If you are specifically looking to take your campaign online and join up with strangers, you can pick the Online Mode, which has unique dungeons and its own leveling system. Realistically, you will need to go back and forth between solo and online play, as you cannot do the former's quests in the latter and vice versa.

Finally, if you want to play with your friends, you can use co-op mode, with one person as the host and everyone else as a guest. Where Winds Meet goes out of its way to be as accommodating as possible, and it manages to shine in nearly every area. The game is ultimately best played with a couple of friends, as this speeds up completing story missions (co-op covers the same ground as Solo Mode).

9 Cry of Fear Sets The Standard For Free Horror Games

An Incredible Free Horror Game With A Co-Op That Is Worth The Headache

Cry of Fear's co-op can be an absolute pain to get running, and you can't just click "host" and get started. You will almost certainly need to use a third-party LAN emulator like Hamachi.

Cry of Fear has been one of the best free games on Steam for more than a decade, but its reputation mostly stems from its pretty fantastic single-player campaign. If you are a horror fan, you should 100% play through the campaign, which tells an intense psychological tragedy centering around a character named Simon. Play the single-player first.

After that, the next option is the standard co-op, which runs through the same levels in reverse. Portraying cops tracking down Simon, the multiplayer shifts away from psychological horror and toward a hard-as-nails shooter with puzzles, and the team needs to work together to survive in one piece.

Then there is also "Manhunt," Cry of Fear's official co-op campaign, born of Team Psykskallar's collaboration with the community. Although its difficulty can be a sticking point for some, "Manhunt" is arguably better than the main co-op mode, offering far more variety in level design, environments, and enemies.

10 With You Is The Perfect Game To Play With Your Partner

Best for: Couples and Intimate 2-Player Collaboration

With You is a wholesome cooperative puzzle-platformer game for two players to enjoy. Together, the couple must collaborate to solve a series of physics and platforming segments through problem-solving, gentle communication, and jumping on each other.

Short and sweet, with its intentionally wonky controls, With You resolves to improve the bonds and intimacy between the two players and (quite literally) bring them closer together. You will probably finish the game pretty quickly, but it is fun while it lasts.