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Check out this fantastic list of free-to-play online co-op games you can enjoy on Steam right now, updated on September 11th 2026. Looking for even more free titles? Explore the complete list of the best free to play online co-op games on Steam.
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1. World of Warships
Immerse yourself in thrilling naval battles and assemble an armada of over 800 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 is a naval combat, action and co-op game. Released on November 15th 2017 has received 146,552 reviews of which 112,887 were positive and 33,665 were negative resulting in a rating of 7.6 out of 10. The game has hit the top spot as the #1 most played online co-op game, thanks to its 5,859 peak concurrent players over the last day.
7.6
112,887
33,665
5,859
players
2. STALZONE
STALZONE is the PvPvE extraction shooter where you don't have to start over — and the only one with persistent world worth belonging to. You are invited to explore the Chernobyl Exclusion Zone twisted by anomalies and divided between rival factions whose territories shape the danger around you STALZONE is a extraction shooter, online co-op and open world game. Released on December 09th 2022 has received 108,067 reviews of which 78,030 were positive and 30,037 were negative resulting in a rating of 7.2 out of 10. While seeing 5,741 players online at once in the last 24 hours, this game is currently ranked #2 among online co-op games based on player count.
7.2
78,030
30,037
5,741
players
3. GrandChase
Grand Chase is a free side-scrolling online action RPG with anime inspired graphics. Enjoy exciting adventures in dungeons and PvP with unique characters. GrandChase is a action, pve and pvp game. Released on July 27th 2021 has received 26,077 reviews of which 17,172 were positive and 8,905 were negative resulting in a rating of 6.5 out of 10. While seeing 3,938 players online at once in the last 24 hours, this game is currently ranked #3 among online co-op games based on player count.
6.5
17,172
8,905
3,938
players
4. Supermarket Together
The multiplayer supermarket has arrived to your neighbourhood for free! Stock your shop space, unlock perks and franchises, hire employees or chase those pesky shoplifters. The more players, the more action! Supermarket Together is a simulation, online co-op and multiplayer game. Released on August 09th 2024 has received 67,435 reviews of which 63,994 were positive and 3,441 were negative resulting in an impressive rating of 9.3 out of 10. With 3,874 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played online co-op games.
9.3
63,994
3,441
3,874
players
5. Stumble Guys
Ready for the chaos? Stumble Guys is a 32-player, fast-paced multiplayer party royale where players dash, jump, and fall across hilarious obstacle courses in a fun race to be the last one standing. Stumble Guys is a battle royale, multiplayer and racing game. Released on October 07th 2021 has received 128,011 reviews of which 108,841 were positive and 19,170 were negative resulting in a rating of 8.4 out of 10. With 2,381 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played online co-op games.
8.4
108,841
19,170
2,381
players
6. Goose Goose Duck
Goose Goose Duck is a game of social deduction for up to 16 players. Players are separated into different groups that are each assigned a different objective. Complete your team’s objective to win! Goose Goose Duck is a multiplayer, online co-op and social deduction game. Released on October 03rd 2021 has received 82,286 reviews of which 71,192 were positive and 11,094 were negative resulting in a rating of 8.5 out of 10. With 2,002 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played online co-op games.
8.5
71,192
11,094
2,002
players
7. GeoGuessr Steam Edition
Explore the world with GeoGuessr Steam Edition! Compete against others, climb divisions, and prove your geography skills. Travel to stunning locations, analyze clues, and make your best guess. Quickplay Duels is unlimited Free-to-play. GeoGuessr Steam Edition is a action, pvp and competitive game. Released on May 08th 2025 has received 31,598 reviews of which 22,050 were positive and 9,548 were negative resulting in a rating of 6.9 out of 10. With 1,385 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played online co-op games.
6.9
22,050
9,548
1,385
players
8. DDNet
Want to play the hardest cooperative 2D platformer ever? Want to finish no map ever? Want to be in pain for hours and cry, getting nothing in return? Come play DDNet with a large community of other sufferers! DDNet is a online co-op, multiplayer and 2d platformer game. Released on August 17th 2020 has received 37,450 reviews of which 33,440 were positive and 4,010 were negative resulting in a rating of 8.8 out of 10. With 681 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played online co-op games.
8.8
33,440
4,010
681
players
9. Dead Frontier 2
Survival horror MMO. As one of the few survivors of the outbreak, you must scratch a living out of the decaying ruins of society. Scavenge for supplies, improve your skills, and trade with other players. All the while, keeping your eyes peeled for the infected lurking around every corner. Dead Frontier 2 is a multiplayer, survival horror and zombies game. Released on July 15th 2019 has received 26,801 reviews of which 18,844 were positive and 7,957 were negative resulting in a rating of 6.9 out of 10. With 536 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played online co-op games.
6.9
18,844
7,957
536
players
10. Dungeon Defenders II
Dungeon Defenders II is a cooperative Action Tower Defense game packed with roleplaying elements like loot, leveling, and pets. Dungeon Defenders II is a multiplayer, online co-op and co-op campaign game. Released on June 20th 2017 has received 21,823 reviews of which 16,882 were positive and 4,941 were negative resulting in a rating of 7.6 out of 10. With 432 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played online co-op games.
7.6
16,882
4,941
432
players
More Online Co-Op & Related Games
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