Free Massively Multiplayer Games on Steam
Steam currently has 6,073 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 4/12/2025.
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. 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 holds the #1 spot for "best free Massively Multiplayer game on Steam" with a Player Score of 73. Its score was calculated by analyzing a total of 612,061 reviews on Steam. This breaks down to a total of 447,242 positive reviews and 164,819 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 |
2. 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 #2 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 614,797 reviews on Steam. This breaks down to a total of 537,945 positive reviews and 76,852 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 |
3. 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 65, placing it in the #3 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 98,165 reviews on Steam. This breaks down to a total of 64,127 positive reviews and 34,038 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 |
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 237,201 reviews on Steam. This breaks down to a total of 179,246 positive reviews and 57,955 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. 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 #5 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 622,609 reviews on Steam. This breaks down to a total of 496,114 positive reviews and 126,495 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.
6. 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 #6 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 553,925 reviews on Steam. This breaks down to a total of 505,344 positive reviews and 48,581 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 |
7. 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 #7 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 14,480 reviews on Steam. This breaks down to a total of 9,448 positive reviews and 5,032 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 |
8. 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 #8 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 20,848 reviews on Steam. This breaks down to a total of 16,569 positive reviews and 4,279 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 |
9. STALCRAFT: X
STALCRAFT: X is the largest open-world online game in the Chernobyl Exclusion Zone. Explore the world full of mutants and anomalies alone or with friends — unforgettable emotions guaranteed.
STALCRAFT: X has achieved a Player Score of 75, placing it in the #9 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 74,545 reviews on Steam. This breaks down to a total of 56,924 positive reviews and 17,621 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 STALCRAFT: X on the Steam Deck (though some functionality may be limited).
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 81,672 reviews on Steam. This breaks down to a total of 64,512 positive reviews and 17,160 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 | ||||
|---|---|---|---|---|---|---|
| 83,086 | 8/15/2013 | 73 | Free | Steam Charts | |
| 61,160 | 3/25/2013 | 87 | Free | Steam Charts | |
| 46,445 | 12/4/2024 | 65 | Free | Steam Charts | |
| 39,077 | 2/1/2017 | 75 | Free | Steam Charts | |
| 31,225 | 10/1/2019 | 79 | Free | Steam Charts | |
| 17,208 | 7/7/2017 | 90 | Free | Steam Charts | |
| 14,555 | 8/25/2021 | 64 | Free | Steam Charts | |
| 14,416 | 4/2/2021 | 78 | Free | Steam Charts | |
| 14,232 | 12/9/2022 | 75 | Free | Steam Charts | |
| 13,006 | 5/16/2018 | 78 | Free | Steam Charts | |
 | 11,576 | 11/11/2021 | 53 | Free | Steam Charts | |
 | 10,128 | 11/9/2016 | 78 | Free | Steam Charts | |
 | 9,990 | 11/15/2017 | 76 | Free | Steam Charts | |
 | 8,589 | 4/29/2021 | 83 | Free | Steam Charts | |
 | 8,369 | 10/23/2013 | 88 | Free | Steam Charts | |
 | 7,560 | 2/19/2016 | 68 | Free | Steam Charts | |
 | 6,332 | 8/27/2024 | 58 | Free | Steam Charts | |
 | 6,116 | 3/13/2025 | 78 | Free | Steam Charts | |
 | 5,798 | 7/21/2020 | 88 | Free | Steam Charts | |
 | 5,769 | 7/16/2024 | 79 | 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, April 12). Steam Store. Steam Store.
- Valve Corporation. (2025, April 12). War Thunder on Steam. Steam Store.
- Valve Corporation. (2025, April 11). Warframe on Steam. Steam Store.
- Valve Corporation. (2025, April 13). Delta Force on Steam. Steam Store.
- Valve Corporation. (2025, April 11). VRChat on Steam. Steam Store.
- Valve Corporation. (2025, April 13). Destiny 2 on Steam. Steam Store.
- Valve Corporation. (2025, April 3). Unturned on Steam. Steam Store.
- Valve Corporation. (2025, April 9). MIR4 on Steam. Steam Store.
- Valve Corporation. (2025, April 11). IdleOn - The Idle RPG on Steam. Steam Store.
- Valve Corporation. (2025, April 11). STALCRAFT: X on Steam. Steam Store.
- Valve Corporation. (2025, April 9). Albion Online on Steam. Steam Store.