Free Online Co-Op Games on Steam
Steam currently has 6,133 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 11/21/2024.
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 87. Its score was calculated by analyzing a total of 8,399,927 reviews on Steam. This breaks down to a total of 7,302,535 positive reviews and 1,097,392 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 2,358,565 reviews on Steam. This breaks down to a total of 1,923,956 positive reviews and 434,609 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
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 has achieved a Player Score of 59, placing it in the #3 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 2,461,483 reviews on Steam. This breaks down to a total of 1,449,788 positive reviews and 1,011,695 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. 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 #4 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 598,103 reviews on Steam. This breaks down to a total of 522,363 positive reviews and 75,740 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 |
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 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 1,124,466 reviews on Steam. This breaks down to a total of 996,076 positive reviews and 128,390 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).
6. 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 has achieved a Player Score of 71, placing it in the #6 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 104,152 reviews on Steam. This breaks down to a total of 74,941 positive reviews and 29,211 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 |
7. 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 has achieved a Player Score of 96, placing it in the #7 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 279,021 reviews on Steam. This breaks down to a total of 270,830 positive reviews and 8,191 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).
8. eFootball™
The feverish football game with a worldwide total of 750 million downloads is waiting for you! Play eFootball™ with users around the world!
eFootball™ has achieved a Player Score of 46, placing it in the #8 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 83,319 reviews on Steam. This breaks down to a total of 38,038 positive reviews and 45,281 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play eFootball™ on the Steam Deck (though some functionality may be limited).
| Release Date | 9/29/2021 |
| Franchise | KONAMI |
| Developers | |
| Publishers | |
| Steam App Id | 1665460 |
9. SUPERVIVE
MOBA BR MEETS HERO SHOOTER. Jump, glide, shoot, punch, bounce, nuke, spike your enemies in this free-flowing, chaotic battleground in the sky. Face off in all-out, multi-squad teamfights, take down boss monsters for big loot, get that W and run it back.
SUPERVIVE has achieved a Player Score of 82, placing it in the #9 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 652 reviews on Steam. This breaks down to a total of 568 positive reviews and 84 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 | 11/20/2024 |
| Developer | Theorycraft Games |
| Publisher | Theorycraft Games |
| Steam App Id | 1283700 |
10. 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 #10 spot for the best free Online Co-Op games. Its score was calculated by analyzing a total of 227,602 reviews on Steam. This breaks down to a total of 203,299 positive reviews and 24,303 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 |
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 | ||||
|---|---|---|---|---|---|---|
| 807,853 | 8/21/2012 | 87 | Free | Steam Charts | |
| 387,607 | 7/9/2013 | 81 | Free | Steam Charts | |
| 342,768 | 12/21/2017 | 59 | Free | Steam Charts | |
| 41,772 | 3/25/2013 | 87 | Free | Steam Charts | |
| 36,340 | 10/10/2007 | 88 | Free | Steam Charts | |
| 34,939 | 7/9/2024 | 71 | Free | Steam Charts | |
| 18,231 | 5/16/2020 | 96 | Free | Steam Charts | |
| 11,667 | 9/29/2021 | 46 | Free | Steam Charts | |
| 11,597 | 11/20/2024 | 82 | Free | Steam Charts | |
| 10,693 | 10/23/2013 | 88 | Free | Steam Charts | |
 | 9,207 | 6/7/2024 | 70 | Free | Steam Charts | |
 | 8,764 | 12/8/2023 | 75 | Free | Steam Charts | |
 | 8,156 | 6/30/2024 | 55 | Free | Steam Charts | |
 | 6,316 | 11/15/2017 | 77 | Free | Steam Charts | |
 | 6,263 | 11/9/2016 | 79 | Free | Steam Charts | |
 | 5,261 | 10/17/2017 | 81 | Free | Steam Charts | |
 | 4,689 | 8/17/2020 | 89 | Free | Steam Charts | |
 | 4,429 | 8/9/2024 | 92 | Free | Steam Charts | |
 | 4,146 | 10/3/2021 | 86 | Free | Steam Charts | |
 | 3,473 | 3/25/2024 | 81 | 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. (2024, November 21). Steam Store. Steam Store.
- Valve Corporation. (2024, November 21). Counter-Strike 2 on Steam. Steam Store.
- Valve Corporation. (2024, November 21). Dota 2 on Steam. Steam Store.
- Valve Corporation. (2024, November 13). PUBG: BATTLEGROUNDS on Steam. Steam Store.
- Valve Corporation. (2024, November 20). Warframe on Steam. Steam Store.
- Valve Corporation. (2024, November 16). Team Fortress 2 on Steam. Steam Store.
- Valve Corporation. (2024, November 21). Once Human on Steam. Steam Store.
- Valve Corporation. (2024, November 16). tModLoader on Steam. Steam Store.
- Valve Corporation. (2024, November 21). eFootball™ on Steam. Steam Store.
- Valve Corporation. (2024, November 21). SUPERVIVE on Steam. Steam Store.
- Valve Corporation. (2024, November 19). Path of Exile on Steam. Steam Store.