Free Online Co-Op Games on Steam

Steam currently has 6,259 Online Co-Op games available to download and play. Explore our list of the best free games ranked by popularity and ratings. Data for this list is calculated from reviews and player counts reported directly by Steam and will be updated in real-time. Free Online Co-Op game rankings were last updated on 12/11/2024.

Looking for more? Explore other lists such as:

1. Counter-Strike 2

For over two decades, Counter-Strike has offered an elite competitive experience, one shaped by millions of players from across the globe. And now the next chapter in the CS story is about to begin. This is Counter-Strike 2.

Counter-Strike 2 banner

Counter-Strike 2 holds the #1 spot for "best free Online Co-Op game on Steam" with a Player Score of 87. Its score was calculated by analyzing a total of 8,430,065 reviews on Steam. This breaks down to a total of 7,327,092 positive reviews and 1,102,973 negative reviews — making it "Very Positive" on Steam.

It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Counter-Strike 2 on the Steam Deck (though some functionality may be limited).

Release Date 8/21/2012
Franchise Valve
Developers
Publisher Valve
Steam App Id 730

2. PUBG: BATTLEGROUNDS

Play PUBG: BATTLEGROUNDS for free. Land on strategic locations, loot weapons and supplies, and survive to become the last team standing across various, diverse Battlegrounds. Squad up and join the Battlegrounds for the original Battle Royale experience that only PUBG: BATTLEGROUNDS can offer.

PUBG: BATTLEGROUNDS banner

PUBG: BATTLEGROUNDS has achieved a Player Score of 59, placing it in the #2 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 2,471,847 reviews on Steam. This breaks down to a total of 1,457,980 positive reviews and 1,013,867 negative reviews — making it "Mixed" on Steam.

It can be played and ran on Windows systems. At the moment, it is not possible to play or run PUBG: BATTLEGROUNDS on the Steam Deck.

Release Date 12/21/2017
Franchise KRAFTON, Inc.
Developers
Publisher KRAFTON, Inc.
Steam App Id 578080

3. Dota 2

Every day, millions of players worldwide enter battle as one of over a hundred Dota heroes. And no matter if it's their 10th hour of play or 1,000th, there's always something new to discover. With regular updates that ensure a constant evolution of gameplay, features, and heroes, Dota 2 has taken on a life of its own.

Dota 2 banner

Dota 2 has achieved a Player Score of 81, placing it in the #3 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 2,395,553 reviews on Steam. This breaks down to a total of 1,955,962 positive reviews and 439,591 negative reviews — making it "Very Positive" on Steam.

It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Dota 2 on the Steam Deck (though some functionality may be limited).

Release Date 7/9/2013
Franchise Dota
Developer Valve
Publisher Valve
Steam App Id 570

4. Marvel Rivals

Marvel Rivals is a Super Hero Team-Based PVP Shooter! Assemble an all-star Marvel squad, devise countless strategies by combining powers to form unique Team-Up skills and fight in destructible, ever-changing battlefields across the continually evolving Marvel universe!

Marvel Rivals banner

Marvel Rivals has achieved a Player Score of 78, placing it in the #4 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 56,912 reviews on Steam. This breaks down to a total of 44,943 positive reviews and 11,969 negative reviews — making it "Mostly Positive" on Steam.

It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.

Release Date 12/6/2024
Developer NetEase Games
Publisher NetEase Games
Steam App Id 2767030

5. Delta Force

Delta Force, a free-to-play 1st-person tactical shooter, returns as the latest in the classic series. With 25 years defining the genre, Delta Force is back with an upgraded arsenal of weaponry, jaw-dropping environments, and a truly dynamic world.

Delta Force banner

Delta Force has achieved a Player Score of 65, placing it in the #5 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 25,250 reviews on Steam. This breaks down to a total of 16,732 positive reviews and 8,518 negative reviews — making it "Mixed" on Steam.

It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.

Release Date 12/4/2024
Developer Team Jade
Publisher TiMi Studio Group
Steam App Id 2507950

6. Warframe

Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game

Warframe banner

Warframe has achieved a Player Score of 87, placing it in the #6 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 600,380 reviews on Steam. This breaks down to a total of 524,557 positive reviews and 75,823 negative reviews — making it "Very Positive" on Steam.

It can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.

Release Date 3/25/2013
Developer Digital Extremes
Publisher Digital Extremes
Steam App Id 230410

7. Team Fortress 2

Nine distinct classes provide a broad range of tactical abilities and personalities. Constantly updated with new game modes, maps, equipment and, most importantly, hats!

Team Fortress 2 banner

Team Fortress 2 has achieved a Player Score of 88, placing it in the #7 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 1,131,892 reviews on Steam. This breaks down to a total of 1,005,732 positive reviews and 126,160 negative reviews — making it "Very Positive" on Steam.

It can be played and ran on both Windows and Linux systems. At the moment, it is possible to play Team Fortress 2 on the Steam Deck (though some functionality may be limited).

Release Date 10/10/2007
Developer Valve
Publisher Valve
Steam App Id 440

8. Once Human

Once Human is a multiplayer open-world survival game set in a strange, post-apocalyptic future. Unite with friends to fight monstrous enemies, uncover secret plots, compete for resources, and build your own territory. Once, you were merely human. Now, you have the power to remake the world.

Once Human banner

Once Human has achieved a Player Score of 73, placing it in the #8 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 113,028 reviews on Steam. This breaks down to a total of 82,887 positive reviews and 30,141 negative reviews — making it "Mostly Positive" on Steam.

It can be played and ran on Windows systems. At the moment, it is not possible to play or run Once Human on the Steam Deck.

Release Date 7/9/2024
Developer Starry Studio
Publisher Starry Studio
Steam App Id 2139460

9. tModLoader

Dig, Fight, and Build your way through the world of player-created mods on Terraria with tModLoader - this DLC makes modding Terraria a reality!

tModLoader banner

tModLoader has achieved a Player Score of 96, placing it in the #9 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 286,703 reviews on Steam. This breaks down to a total of 278,430 positive reviews and 8,273 negative reviews — making it "Overwhelmingly Positive" on Steam.

It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play tModLoader on the Steam Deck (though some functionality may be limited).

Release Date 5/16/2020
Developer TML Team
Publishers
Steam App Id 1281930

10. THE FINALS

Join THE FINALS, the world-famous, free-to-play, combat-centered game show! Fight alongside your teammates in virtual arenas that you can alter, exploit, and even destroy. Build your own playstyle in this first-person shooter to win escalating tournaments and lasting fame.

THE FINALS banner

THE FINALS has achieved a Player Score of 76, placing it in the #10 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 210,527 reviews on Steam. This breaks down to a total of 162,258 positive reviews and 48,269 negative reviews — making it "Mostly Positive" on Steam.

It can be played and ran on Windows systems. At the moment, it is possible to play THE FINALS on the Steam Deck (though some functionality may be limited).

Release Date 12/7/2023
Developer Embark Studios
Publisher Embark Studios
Steam App Id 2073850

More Free Online Co-Op Games

Explore even more rankings for the 100 best free Online Co-Op games available on Steam.

ImageName
Actions
Counter-Strike 2 steam charts
1,453,415
8/21/2012
87
Free
Steam Charts
PUBG: BATTLEGROUNDS steam charts
737,929
12/21/2017
59
Free
Steam Charts
Dota 2 steam charts
540,868
7/9/2013
81
Free
Steam Charts
Marvel Rivals steam charts
282,799
12/6/2024
78
Free
Steam Charts
Delta Force steam charts
85,040
12/4/2024
65
Free
Steam Charts
Warframe steam charts
47,585
3/25/2013
87
Free
Steam Charts
Team Fortress 2 steam charts
47,394
10/10/2007
88
Free
Steam Charts
Once Human steam charts
41,151
7/9/2024
73
Free
Steam Charts
tModLoader steam charts
26,334
5/16/2020
96
Free
Steam Charts
THE FINALS steam charts
21,925
12/7/2023
76
Free
Steam Charts
The First Descendant steam charts
20,668
6/30/2024
56
Free
Steam Charts
Goose Goose Duck steam charts
18,610
10/3/2021
86
Free
Steam Charts
eFootball™ steam charts
14,710
9/30/2021
46
Free
Steam Charts
World of Warships steam charts
14,589
11/15/2017
77
Free
Steam Charts
Strinova steam charts
14,167
11/21/2024
76
Free
Steam Charts
World of Tanks Blitz steam charts
10,284
11/9/2016
79
Free
Steam Charts
Dark and Darker steam charts
9,569
6/7/2024
71
Free
Steam Charts
Path of Exile steam charts
8,837
10/23/2013
89
Free
Steam Charts
Brawlhalla steam charts
7,825
10/17/2017
81
Free
Steam Charts
Supermarket Together steam charts
6,793
8/9/2024
93
Free
Steam Charts
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Soures & References

Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Player counts and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.

  • Valve Corporation. (2024, December 11). Steam Store. Steam Store.
  • Valve Corporation. (2024, December 11). Counter-Strike 2 on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). PUBG: BATTLEGROUNDS on Steam. Steam Store.
  • Valve Corporation. (2024, December 12). Dota 2 on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). Marvel Rivals on Steam. Steam Store.
  • Valve Corporation. (2024, December 12). Delta Force on Steam. Steam Store.
  • Valve Corporation. (2024, December 6). Warframe on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). Team Fortress 2 on Steam. Steam Store.
  • Valve Corporation. (2024, December 12). Once Human on Steam. Steam Store.
  • Valve Corporation. (2024, December 2). tModLoader on Steam. Steam Store.
  • Valve Corporation. (2024, December 12). THE FINALS on Steam. Steam Store.

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