Online co-op Indie games

Every online co-op Indie game on Steam we know of. Add tags, a price band or a review floor to narrow it down.

Showing 1091–1100 of 3,535 games matching Indie, newest first · updated 14 Oct 2026

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M.A.S.S. Builder

Deck Playable
$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
85% of 3,733

Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
90% of 53

Sport Animals is a physics-based game about a group of animals playing a sport! Customize your animal, practice your game, and get onto the field start scoring goals in 1v1s, 2v2s, or 3v3s. Compete against your friends or join public lobbies to play against other animals!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
64% of 17

A chaotic third-person shooter where stereotypes come to life. Fight waves of rednecks, Karens, and more in this satirical, round-based shooter packed with dumb weapons, unpredictable AI, and over-the-top action.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Up to 2 players
Reviews
91% of 199

🐱 Discover 100 hidden cats 🌍 in handcrafted scenes that capture the spirit of each country. Relax with color-by-numbers 🎨 and bring illustrations to life. Play solo or in cozy co-op 👯‍♂️, while Meow FM 🎶 sets the mood.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
90% of 938

Endless fantasy action and adventure await you and your friends in Dungeons of Eternity. Hack-n-slash takes on a new meaning in VR: swing swords, throw axes, use bows, wield magic staffs, and more to make it out alive. Become the most powerful adventurer in this blockbuster VR experience!

If you loved these, you'll love this

−35%
$$
Released
Price
$$ · Standard · On sale −35% until 19 Oct
Players
👥 Not stated
Reviews
77% of 441

Professional Fishing 2 is a realistic open-world simulator, for playing solo or with friends, that will take you through different regions where you can fish a wide variety of species while being enveloped by its calmness and natural surroundings.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Up to 6 players
Reviews
0% of 2

Online PvP action and roguelike multiplayer combat. Battle with random abilities in PSI Masquerade, bring gear and allies into Transrealm Masquerade, or explore the roguelike Deadly Wonderland, playable both online and offline.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Immerse yourself in a first-person shooter where Low-poly cartoonish visuals clash with a sinister, gloomy atmosphere. Armed with a massive arsenal of weapons, you’ll blast through hordes of Enemies, infiltrate a sinister lab, and fight your way to the escape point.

If you loved these, you'll love this