Online co-op Building games

Every online co-op Building game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 191–200 of 577 games matching Building · updated 12 Oct 2026

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Reviews
84% of 743

From a small village of a dozen people to a small kingdom of thousands of people. Arrange for residents to work, gathering, fishing and hunting, farming and mining, processing and manufacturing. Trade, accumulate supplies, increase your strength, and fight evil forces and monsters.

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Reviews
94% of 17

Build spacecrafts and fight with or against your friends! This game offers physics driven gameplay, with a variety of weapons and powerups. Slice your enemies in half with a laser beam, or erase them from existence with a black hole bomb!

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👥 1–4 players
Reviews
78% of 3,649

Car Service Together is a 1-4 co-op & single player simulation game where you and/or with your friends start from scratch and build your way up. Work together to successfully run your own service center. Team up, manage your business, and create the ultimate car service !

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$ · Cheap
Players
👥 Not stated
Reviews
95% of 21

Lofi Haven integrates rich lofi tracks with white noise to build your ultimate sanctuary. Decorate your space and bond with customizable, adorable pets during breaks. No matter how busy life gets, here is your personal harbor to relax, focus, and recharge your soul.

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38% of 13

An action RPG meets tower defense. Fight as a hero who moves freely between Melee, Ranged, and Magic, build your territory, and raise towers to hold back hundreds of monsters pouring from dimensional rifts.

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Players
👥 Up to 4 players
Reviews
71% of 1,662

In this dark, open-world adventure, you awaken as a Vampire Lord. Build and customize your castle. Hunt for blood, fight, craft, and gather. Command your loyal servants. Shapeshift into a bat to explore the night and survive the relentless Inquisition, solo or in 4-player co-op.

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22% of 81

Embark on an epic adventure to Mars in Horizon Journey, an open-world survival game that blends colonization, terraforming, and exploration in both single-player and multiplayer co-op modes. You're tasked with the monumental challenge of making Mars a new home for humanity.

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👥 Not stated
Reviews
68% of 2,728

Survive and colonize Mars alone or in online co-op. Build and upgrade your base, craft equipment, mine resources, produce water, oxygen and food, explore an open world, and repair complex machinery in a technical survival sandbox.

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Released
Price
$$ · Standard
Players
👥 Up to 6 players
Reviews
88% of 197

Brave a savage, unforgiving procedurally generated world where extreme weather and the nightmares of the dark will hunt you down. Alone or in co-op, survive, build, and explore to turn a cursed hellscape into your sanctuary of light.

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