Free Online Co-Op Games on Steam
Steam currently has 8,142 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 11/19/2025.
Looking for more? Explore other lists such as:
- Best online co-op games on Steam
- Best online co-op Steam Deck games
- Best online co-op Steam games for Mac OS
- Best online co-op Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
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 holds the #1 spot for "best free Online Co-Op game on Steam" with a Player Score of 86. Its score was calculated by analyzing a total of 9,171,632 reviews on Steam. This breaks down to a total of 7,920,123 positive reviews and 1,251,509 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).
2. 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 has achieved a Player Score of 81, placing it in the #2 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 2,594,492 reviews on Steam. This breaks down to a total of 2,107,927 positive reviews and 486,565 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).
3. PUBG: BATTLEGROUNDS
PUBG: BATTLEGROUNDS, the high-stakes winner-take-all shooter that started the Battle Royale craze, is free-to-play! Drop into diverse maps, loot unique weapons and supplies, and survive in an ever-shrinking zone where every turn could be your last.
PUBG: BATTLEGROUNDS has achieved a Player Score of 60, placing it in the #3 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 2,632,155 reviews on Steam. This breaks down to a total of 1,573,727 positive reviews and 1,058,428 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 |
4. Where Winds Meet
Where Winds Meet is an epic Wuxia open-world action-adventure RPG set in ancient China at the tenth century. Players will assume the role of a young sword master as they embark on a journey to uncover the mysteries of their own identity. Let the wind carry your legend on an epic journey to the East!
Where Winds Meet has achieved a Player Score of 82, placing it in the #4 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 24,078 reviews on Steam. This breaks down to a total of 20,194 positive reviews and 3,884 negative reviews — making it "Very 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 | 11/14/2025 |
| Developer | Everstone Studio |
| Publisher | NetEase Games |
| Steam App Id | 3564740 |
5. 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 has achieved a Player Score of 76, placing it in the #5 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 330,115 reviews on Steam. This breaks down to a total of 253,456 positive reviews and 76,659 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 Marvel Rivals on the Steam Deck (though some functionality may be limited).
| Release Date | 12/6/2024 |
| Developer | NetEase Games |
| Publisher | NetEase Games |
| Steam App Id | 2767030 |
6. Path of Exile
You are an Exile, struggling to survive on the dark continent of Wraeclast, as you fight to earn power that will allow you to exact your revenge against those who wronged you. Path of Exile is an online Action RPG set in a dark fantasy world. The game is completely free and will never be pay-to-win.
Path of Exile has achieved a Player Score of 88, placing it in the #6 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 241,820 reviews on Steam. This breaks down to a total of 215,084 positive reviews and 26,736 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Path of Exile on the Steam Deck (though some functionality may be limited).
| Release Date | 10/23/2013 |
| Developer | Grinding Gear Games |
| Publisher | Grinding Gear Games |
| Steam App Id | 238960 |
7. 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 has achieved a Player Score of 58, placing it in the #7 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 156,290 reviews on Steam. This breaks down to a total of 91,139 positive reviews and 65,151 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 Delta Force on the Steam Deck.
| Release Date | 12/4/2024 |
| Developers | |
| Publisher | TiMi Studio Group |
| Steam App Id | 2507950 |
8. Warframe
Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game
Warframe has achieved a Player Score of 87, placing it in the #8 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 638,001 reviews on Steam. This breaks down to a total of 557,777 positive reviews and 80,224 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 |
9. 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 has achieved a Player Score of 90, placing it in the #9 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 1,190,076 reviews on Steam. This breaks down to a total of 1,076,499 positive reviews and 113,577 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).
10. Tom Clancy's Rainbow Six® Siege X
Rainbow Six Siege X is the reference in tactical team shooters, where elite strategy and execution triumph. Enjoy free access to Quick Match, Unranked and Dual Front game modes with a selection of operators.
Tom Clancy's Rainbow Six® Siege X has achieved a Player Score of 82, placing it in the #10 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 1,455,743 reviews on Steam. This breaks down to a total of 1,206,131 positive reviews and 249,612 negative reviews — making it "Very Positive" on Steam.
It can be played and ran on Windows systems. At the moment, it is not possible to play or run Tom Clancy's Rainbow Six® Siege X on the Steam Deck.
| Release Date | 12/1/2015 |
| Developer | Ubisoft Montreal |
| Publisher | Ubisoft |
| Steam App Id | 359550 |
More Free Online Co-Op Games
Explore even more rankings for the 100 best free Online Co-Op games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 1,266,597 | 8/21/2012 | 86 | Free | Steam Charts | |
| 707,717 | 7/9/2013 | 81 | Free | Steam Charts | |
| 232,845 | 12/21/2017 | 60 | Free | Steam Charts | |
| 181,076 | 11/14/2025 | 82 | Free | Steam Charts | |
| 71,265 | 12/6/2024 | 76 | Free | Steam Charts | |
| 66,590 | 10/23/2013 | 88 | Free | Steam Charts | |
| 63,627 | 12/4/2024 | 58 | Free | Steam Charts | |
| 50,191 | 3/25/2013 | 87 | Free | Steam Charts | |
| 41,371 | 10/10/2007 | 90 | Free | Steam Charts | |
| 36,820 | 12/1/2015 | 82 | Free | Steam Charts | |
 | 26,508 | 8/10/2023 | 26 | Free | Steam Charts | |
 | 21,863 | 5/16/2020 | 96 | Free | Steam Charts | |
 | 15,782 | 9/30/2021 | 49 | Free | Steam Charts | |
 | 15,324 | 7/9/2024 | 76 | Free | Steam Charts | |
 | 12,432 | 10/17/2017 | 80 | Free | Steam Charts | |
 | 10,563 | 12/8/2023 | 77 | Free | Steam Charts | |
 | 9,385 | 9/16/2025 | 68 | Free | Steam Charts | |
 | 9,051 | 7/17/2025 | 55 | Free | Steam Charts | |
 | 8,042 | 3/25/2024 | 84 | Free | Steam Charts | |
 | 7,001 | 11/9/2016 | 77 | Free | Steam Charts |
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. (2025, November 19). Steam Store. Steam Store.
- Valve Corporation. (2025, November 19). Counter-Strike 2 on Steam. Steam Store.
- Valve Corporation. (2025, November 19). Dota 2 on Steam. Steam Store.
- Valve Corporation. (2025, November 12). PUBG: BATTLEGROUNDS on Steam. Steam Store.
- Valve Corporation. (2025, November 19). Where Winds Meet on Steam. Steam Store.
- Valve Corporation. (2025, November 19). Marvel Rivals on Steam. Steam Store.
- Valve Corporation. (2025, November 7). Path of Exile on Steam. Steam Store.
- Valve Corporation. (2025, November 19). Delta Force on Steam. Steam Store.
- Valve Corporation. (2025, November 12). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, November 7). Team Fortress 2 on Steam. Steam Store.
- Valve Corporation. (2025, November 19). Tom Clancy's Rainbow Six® Siege X on Steam. Steam Store.