Free Massively Multiplayer Games on Steam

Steam currently has 6,584 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 10/14/2025.

Looking for more? Explore other lists such as:

1. Bongo Cat

Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?

Bongo Cat banner

Bongo Cat holds the #1 spot for "best free Massively Multiplayer game on Steam" with a Player Score of 95. Its score was calculated by analyzing a total of 45,907 reviews on Steam. This breaks down to a total of 44,649 positive reviews and 1,258 negative reviews — making it "Overwhelmingly 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 3/5/2025
Developers
Publisher Irox Games
Steam App Id 3419430

2. 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 59, placing it in the #2 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 150,345 reviews on Steam. This breaks down to a total of 88,633 positive reviews and 61,712 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

3. 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 #3 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 634,337 reviews on Steam. This breaks down to a total of 554,201 positive reviews and 80,136 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 banner

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 248,263 reviews on Steam. This breaks down to a total of 187,166 positive reviews and 61,097 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. 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 banner

War Thunder has achieved a Player Score of 72, placing it in the #5 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 668,609 reviews on Steam. This breaks down to a total of 485,792 positive reviews and 182,817 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

6. Blue Protocol: Star Resonance

Blue Protocol: Star Resonance expands the Blue Protocol universe with a vibrant MMORPG experience. Create your own hero, team up for strategic raids, or simply relax and have fun with friends fishing, crafting, and endless exploration. Adventure awaits!

Blue Protocol: Star Resonance banner

Blue Protocol: Star Resonance has achieved a Player Score of 49, placing it in the #6 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 12,322 reviews on Steam. This breaks down to a total of 6,058 positive reviews and 6,264 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 10/9/2025
Developer Shanghai Bokura Network Technology Co.Ltd
Publisher A Plus
Steam App Id 3681810

7. World of Warships

Immerse yourself in thrilling naval battles and assemble an armada of over 600 ships from the first half of the 20th century — from stealthy destroyers to gigantic battleships. Change the look of your ship, choose upgrades to suit your play style, and go into battle with other players!

World of Warships banner

World of Warships has achieved a Player Score of 76, placing it in the #7 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 149,606 reviews on Steam. This breaks down to a total of 114,743 positive reviews and 34,863 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 World of Warships on the Steam Deck (though some functionality may be limited).

Release Date 11/15/2017
Franchise World of Warships Franchise
Developer Wargaming Group Limited
Publisher Wargaming Group Limited
Steam App Id 552990

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 76, placing it in the #8 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 151,987 reviews on Steam. This breaks down to a total of 115,889 positive reviews and 36,098 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. 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 banner

MIR4 has achieved a Player Score of 64, placing it in the #9 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 14,685 reviews on Steam. This breaks down to a total of 9,590 positive reviews and 5,095 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

10. 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 banner

Unturned has achieved a Player Score of 90, placing it in the #10 spot for the best free Massively Multiplayer games. Its score was calculated by analyzing a total of 557,969 reviews on Steam. This breaks down to a total of 508,348 positive reviews and 49,621 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

More Free Massively Multiplayer Games

Explore even more rankings for the 100 best free Massively Multiplayer games available on Steam.

ImageName
Actions
Bongo Cat steam charts
95,986
3/5/2025
95
Free
Steam Charts
Delta Force steam charts
80,301
12/4/2024
59
Free
Steam Charts
Warframe steam charts
42,618
3/25/2013
87
Free
Steam Charts
VRChat steam charts
34,493
2/1/2017
75
Free
Steam Charts
War Thunder steam charts
27,756
8/15/2013
72
Free
Steam Charts
Blue Protocol: Star Resonance steam charts
27,540
10/9/2025
49
Free
Steam Charts
World of Warships steam charts
20,511
11/15/2017
76
Free
Steam Charts
Once Human steam charts
16,936
7/9/2024
76
Free
Steam Charts
MIR4 steam charts
14,232
8/25/2021
64
Free
Steam Charts
Unturned steam charts
10,516
7/7/2017
90
Free
Steam Charts
Russian Fishing 4 steam charts
9,673
11/11/2021
55
Free
Steam Charts
Destiny 2 steam charts
9,189
10/1/2019
78
Free
Steam Charts
STALCRAFT: X steam charts
6,863
12/9/2022
73
Free
Steam Charts
Off The Grid steam charts
6,466
7/17/2025
55
Free
Steam Charts
IdleOn steam charts
6,376
4/2/2021
78
Free
Steam Charts
Warborne Above Ashes steam charts
4,760
9/19/2025
50
Free
Steam Charts
Albion Online steam charts
4,595
5/16/2018
78
Free
Steam Charts
World of Tanks steam charts
4,177
4/29/2021
80
Free
Steam Charts
World of Tanks Blitz steam charts
3,001
11/9/2016
78
Free
Steam Charts
Path of Exile steam charts
2,886
10/23/2013
88
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. (2025, October 14). Steam Store. Steam Store.
  • Valve Corporation. (2025, October 14). Bongo Cat on Steam. Steam Store.
  • Valve Corporation. (2025, October 20). Delta Force on Steam. Steam Store.
  • Valve Corporation. (2025, October 19). Warframe on Steam. Steam Store.
  • Valve Corporation. (2025, October 17). VRChat on Steam. Steam Store.
  • Valve Corporation. (2025, October 18). War Thunder on Steam. Steam Store.
  • Valve Corporation. (2025, October 20). Blue Protocol: Star Resonance on Steam. Steam Store.
  • Valve Corporation. (2025, October 15). World of Warships on Steam. Steam Store.
  • Valve Corporation. (2025, October 19). Once Human on Steam. Steam Store.
  • Valve Corporation. (2025, October 14). MIR4 on Steam. Steam Store.
  • Valve Corporation. (2025, October 17). Unturned on Steam. Steam Store.

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