Free Massively Multiplayer Games on Steam
Steam currently has 6,165 Massively Multiplayer 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 Massively Multiplayer game rankings were last updated on 5/5/2025.
Looking for more? Explore other lists such as:
- Best massively multiplayer games on Steam
- Best massively multiplayer Steam Deck games
- Best massively multiplayer Steam games for Mac OS
- Best massively multiplayer Linux games on Steam
- Free Steam games
- Most played Steam games
- Best rated Steam games
1. 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 holds the #1 spot for "best free Massively Multiplayer game on Steam" with a Player Score of 64. Its score was calculated by analyzing a total of 104,721 reviews on Steam. This breaks down to a total of 67,579 positive reviews and 37,142 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 |
2. War Thunder
War Thunder is the most comprehensive free-to-play, cross-platform, MMO military game dedicated to aviation, armoured vehicles, and naval craft, from the early 20th century to the most advanced modern combat units. Join now and take part in major battles on land, in the air, and at sea.
War Thunder has achieved a Player Score of 73, placing it in the #2 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 618,354 reviews on Steam. This breaks down to a total of 452,124 positive reviews and 166,230 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.
| Release Date | 8/15/2013 |
| Franchise | Gaijin Network Ltd |
| Developer | Gaijin Entertainment |
| Publishers | |
| Steam App Id | 236390 |
3. 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 #3 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 616,591 reviews on Steam. This breaks down to a total of 539,602 positive reviews and 76,989 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 |
4. VRChat
Join our growing community as you explore, play, and help craft the future of social VR. Create worlds and custom avatars. Welcome to VRChat.
VRChat has achieved a Player Score of 75, placing it in the #4 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 238,370 reviews on Steam. This breaks down to a total of 180,171 positive reviews and 58,199 negative reviews — making it "Mostly 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 | 2/1/2017 |
| Developer | VRChat Inc. |
| Publisher | VRChat Inc. |
| Steam App Id | 438100 |
5. Unturned
You're a survivor in the zombie infested ruins of society, and must work with your friends and forge alliances to remain among the living.
Unturned has achieved a Player Score of 90, placing it in the #5 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 554,559 reviews on Steam. This breaks down to a total of 505,865 positive reviews and 48,694 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 Unturned on the Steam Deck (though some functionality may be limited).
| Release Date | 7/7/2017 |
| Developer | Smartly Dressed Games |
| Publisher | Smartly Dressed Games |
| Steam App Id | 304930 |
6. MIR4
MIR4 is a free-to-play open world K-fantasy MMORPG that can be cross-played on both PC and mobile devices. MIR4 is full of action and features numerous large scale clan PVP battles. Join now and become a legend.
MIR4 has achieved a Player Score of 64, placing it in the #6 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 14,513 reviews on Steam. This breaks down to a total of 9,470 positive reviews and 5,043 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 MIR4 on the Steam Deck.
| Release Date | 8/25/2021 |
| Developer | Wemade Next |
| Publisher | Wemade |
| Steam App Id | 1623660 |
7. IdleOn - The Idle RPG
Create different classes who all work together when you're gone! When you return, spend their loot on powerful upgrades and synergies - but don't be fooled by the simple graphics, IdleOn gets more complex with each World Boss you defeat!
IdleOn - The Idle RPG has achieved a Player Score of 78, placing it in the #7 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 21,263 reviews on Steam. This breaks down to a total of 16,973 positive reviews and 4,290 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 IdleOn - The Idle RPG on the Steam Deck (though some functionality may be limited).
| Release Date | 4/2/2021 |
| Developer | Lavaflame2 |
| Publisher | Lavaflame2 |
| Steam App Id | 1476970 |
8. Destiny 2
Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.
Destiny 2 has achieved a Player Score of 79, placing it in the #8 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 623,457 reviews on Steam. This breaks down to a total of 496,635 positive reviews and 126,822 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 Destiny 2 on the Steam Deck.
9. Russian Fishing 4
Russian Fishing 4 is a fishing simulator with RPG elements. There is no story line and the whole process is based on the concept of an open, free to roam and free to play game.
Russian Fishing 4 has achieved a Player Score of 53, placing it in the #9 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 72,315 reviews on Steam. This breaks down to a total of 38,541 positive reviews and 33,774 negative reviews — making it "Mixed" on Steam.
It can be played and ran on Windows systems. At the moment, it is possible to play Russian Fishing 4 on the Steam Deck (though some functionality may be limited).
| Release Date | 11/11/2021 |
| Developers | |
| Publishers | |
| Steam App Id | 766570 |
10. Albion Online
Albion Online is a fantasy sandbox MMORPG featuring a player-driven economy, classless combat system, and intense PvP battles. Explore a vast open world full of danger and opportunity. Grow your wealth, forge alliances, and leave your mark on the world of Albion.
Albion Online has achieved a Player Score of 78, placing it in the #10 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 82,198 reviews on Steam. This breaks down to a total of 64,916 positive reviews and 17,282 negative reviews — making it "Mostly Positive" on Steam.
It can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Albion Online on the Steam Deck (though some functionality may be limited).
| Release Date | 5/16/2018 |
| Developer | Sandbox Interactive GmbH |
| Publisher | Sandbox Interactive GmbH |
| Steam App Id | 761890 |
More Free Massively Multiplayer Games
Explore even more rankings for the 100 best free Massively Multiplayer games available on Steam.
| Image | Name | Actions | ||||
|---|---|---|---|---|---|---|
| 95,054 | 12/4/2024 | 64 | Free | Steam Charts | |
| 46,903 | 8/15/2013 | 73 | Free | Steam Charts | |
| 35,012 | 3/25/2013 | 87 | Free | Steam Charts | |
| 31,982 | 2/1/2017 | 75 | Free | Steam Charts | |
| 21,690 | 7/7/2017 | 90 | Free | Steam Charts | |
| 14,212 | 8/25/2021 | 64 | Free | Steam Charts | |
| 13,439 | 4/2/2021 | 78 | Free | Steam Charts | |
| 13,293 | 10/1/2019 | 79 | Free | Steam Charts | |
| 11,916 | 11/11/2021 | 53 | Free | Steam Charts | |
| 6,914 | 5/16/2018 | 78 | Free | Steam Charts | |
 | 6,886 | 11/15/2017 | 76 | Free | Steam Charts | |
 | 6,735 | 12/9/2022 | 75 | Free | Steam Charts | |
 | 5,222 | 11/9/2016 | 78 | Free | Steam Charts | |
 | 4,855 | 10/23/2013 | 88 | Free | Steam Charts | |
 | 4,488 | 4/29/2021 | 83 | Free | Steam Charts | |
 | 3,896 | 10/3/2021 | 85 | Free | Steam Charts | |
 | 3,498 | 4/10/2024 | 86 | Free | Steam Charts | |
 | 3,079 | 7/16/2024 | 79 | Free | Steam Charts | |
 | 3,018 | 12/16/2010 | 73 | Free | Steam Charts | |
 | 2,933 | 2/21/2024 | 55 | 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, May 5). Steam Store. Steam Store.
- Valve Corporation. (2025, May 5). Delta Force on Steam. Steam Store.
- Valve Corporation. (2025, May 5). War Thunder on Steam. Steam Store.
- Valve Corporation. (2025, May 1). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, May 2). VRChat on Steam. Steam Store.
- Valve Corporation. (2025, May 3). Unturned on Steam. Steam Store.
- Valve Corporation. (2025, April 29). MIR4 on Steam. Steam Store.
- Valve Corporation. (2025, April 29). IdleOn - The Idle RPG on Steam. Steam Store.
- Valve Corporation. (2025, May 4). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2025, May 4). Russian Fishing 4 on Steam. Steam Store.
- Valve Corporation. (2025, April 27). Albion Online on Steam. Steam Store.