Free to Play Co-op Campaign Games on Steam
Check out this fantastic list of free-to-play co-op campaign games you can enjoy on Steam right now, updated on September 15th 2025. Looking for even more free titles? Explore the complete list of the best free to play co-op campaign games.
Lists & Categories
1. 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 game developed and published by . 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. The game has hit the top spot as the #1 most played co-op campaign game, thanks to its 327 peak concurrent players over the last day.
7.6
16,882
4,941
327
players
2. Xanadu Land
Xanadu land is a fast-paced massively multiplayer bullet hell game that brings you to the arcade gameplay. In the nonstop BOSS battle, your death is just the beginning，accumulate experience, acquire equipment, and fight side by side with other players to knockdown all the BOSSes! Xanadu Land is a game developed and published by . Released on August 02nd 2025 has received 802 reviews of which 655 were positive and 147 were negative resulting in a rating of 7.7 out of 10. The game currently holds the #2 spot among the most played co-op campaign games.
7.7
655
147
17
players
3. United heist
Your crew consists of two elite thieves. A client hires you to steal a mysterious item. One handles intel; the other infiltrates. Choose your roles and master the heist in this asymmetric co-op puzzle game. United heist is a game developed and published by . Released on February 12th 2023 has received 1,799 reviews of which 1,482 were positive and 317 were negative resulting in a rating of 7.9 out of 10. The game currently holds the #3 spot among the most played co-op campaign games.
7.9
1,482
317
11
players
4. With You
With You is a cooperative two-player puzzle-playground. It's a tiny game that hopes to inspire couples to connect, communicate, and collaborate. With You is a game developed and published by . Released on March 07th 2022 has received 2,718 reviews of which 2,415 were positive and 303 were negative resulting in a rating of 8.5 out of 10. The game currently holds the #4 spot among the most played co-op campaign games.
8.5
2,415
303
2
players
5. Eronoctosis: Put Yourself Together
A 2-Player Networked Horror Co-Op game. Explore the deepest recesses of your mind to put yourself back together. Work together to defend yourself from its denizens. Eronoctosis: Put Yourself Together is a game developed and published by . Released on October 10th 2021 has received 1,842 reviews of which 1,669 were positive and 173 were negative resulting in a rating of 8.6 out of 10. The game currently holds the #5 spot among the most played co-op campaign games.
8.6
1,669
173
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