Free Online Co-Op Games on Steam

Steam currently has 6,255 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 8,427,597 reviews on Steam. This breaks down to a total of 7,325,088 positive reviews and 1,102,509 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 2,470,786 reviews on Steam. This breaks down to a total of 1,457,197 positive reviews and 1,013,589 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 2,393,578 reviews on Steam. This breaks down to a total of 1,954,212 positive reviews and 439,366 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 77, placing it in the #4 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 49,182 reviews on Steam. This breaks down to a total of 38,589 positive reviews and 10,593 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. 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 #5 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 1,131,744 reviews on Steam. This breaks down to a total of 1,005,470 positive reviews and 126,274 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

6. 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 #6 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 21,885 reviews on Steam. This breaks down to a total of 14,290 positive reviews and 7,595 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

7. 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 #7 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 600,203 reviews on Steam. This breaks down to a total of 524,399 positive reviews and 75,804 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

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 112,802 reviews on Steam. This breaks down to a total of 82,754 positive reviews and 30,048 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 286,570 reviews on Steam. This breaks down to a total of 278,300 positive reviews and 8,270 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 First Descendant

The First Descendant is a third-person looter shooter powered by Unreal Engine 5. Become a Descendant. Fight for the survival of humanity. Descendants have unique abilities to tackle both solo and co-op missions. Up to 4 players use varied mechanics to defeat giant bosses. BE THE FIRST DESCENDANT!

The First Descendant banner

The First Descendant has achieved a Player Score of 56, placing it in the #10 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 95,668 reviews on Steam. This breaks down to a total of 54,213 positive reviews and 41,455 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 The First Descendant on the Steam Deck.

Release Date 6/30/2024
Developer NEXON Games Co., Ltd.
Publisher NEXON
Steam App Id 2074920

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
721,592
8/21/2012
87
Free
Steam Charts
PUBG: BATTLEGROUNDS steam charts
320,364
12/21/2017
59
Free
Steam Charts
Dota 2 steam charts
290,800
7/9/2013
81
Free
Steam Charts
Marvel Rivals steam charts
254,633
12/6/2024
77
Free
Steam Charts
Team Fortress 2 steam charts
43,287
10/10/2007
88
Free
Steam Charts
Delta Force steam charts
43,110
12/4/2024
65
Free
Steam Charts
Warframe steam charts
32,522
3/25/2013
87
Free
Steam Charts
Once Human steam charts
23,867
7/9/2024
73
Free
Steam Charts
tModLoader steam charts
18,810
5/16/2020
96
Free
Steam Charts
The First Descendant steam charts
13,817
6/30/2024
56
Free
Steam Charts
THE FINALS steam charts
8,349
12/8/2023
76
Free
Steam Charts
Strinova steam charts
7,214
11/21/2024
76
Free
Steam Charts
Path of Exile steam charts
6,477
10/23/2013
89
Free
Steam Charts
World of Warships steam charts
6,413
11/15/2017
77
Free
Steam Charts
Dark and Darker steam charts
5,983
6/7/2024
71
Free
Steam Charts
eFootball™ steam charts
5,137
9/29/2021
46
Free
Steam Charts
Brawlhalla steam charts
4,717
10/17/2017
81
Free
Steam Charts
World of Tanks Blitz steam charts
4,465
11/9/2016
79
Free
Steam Charts
SUPERVIVE steam charts
3,621
11/20/2024
88
Free
Steam Charts
Supermarket Together steam charts
3,416
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 7). Dota 2 on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). Marvel Rivals on Steam. Steam Store.
  • Valve Corporation. (2024, December 5). Team Fortress 2 on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). Delta Force on Steam. Steam Store.
  • Valve Corporation. (2024, December 6). Warframe on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). Once Human on Steam. Steam Store.
  • Valve Corporation. (2024, December 2). tModLoader on Steam. Steam Store.
  • Valve Corporation. (2024, December 11). The First Descendant on Steam. Steam Store.

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