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 1–10 of 577 games matching Building Β· updated 12 Oct 2026

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Not stated

Tower defense where the maze is yours to build and the ammunition is yours to manufacture. 16 towers, a factory of belts and assemblers fed by enemy debris, and a card every wave. Reach wave 50 β€” then find out that Hard was the easy one.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ 1–4 players
Reviews
71% of 815

Permafrost is a story-driven survival sandbox set in a frozen, post-apocalyptic world. Discover a vast lore-rich open world, alone or in co-op with up to 4 players. Explore, scavenge, craft, and build a network of shelters to outlast the cold.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Up to 4 players

Physics meets tower defense in this chaotic party game up to 4 players. Craft barricades and turrets with whatever you can find. But beware: relentless waves of enemies are coming to tear down everything you build.

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ 1–4 players
Reviews
94% of 70

Sort The Capybaras is a cozy organizing simulator for 1–4 players. Sort more than 4,800 capybara toys with 240 unique designs and place them on their proper shelves. Enjoy the satisfying rush of using powerful skills to turn a messy capybara shop into a perfectly organized collection.

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Free
Released
Price
Free
Players
πŸ‘₯ Not stated
Reviews
72% of 50

FrontWars is a free-to-play multiplayer strategy game where hundreds of players battle for global domination! Build alliances, command armies, grow your economy, and unleash nuclear strikes to wipe your rivals off the map. No pay-to-win: only the strongest will rule the world.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Up to 4 players
Reviews
88% of 96

Command your ship and fleet in a galaxy that truly lives: 150 sectors where six factions mine, haul, trade, build and wage war whether you're there or not. Trade it, rob it, defend it β€” or forge your own fleet and carve out your place in it. Play solo or in online co-op.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Up to 8 players
Reviews
60% of 5

Turn a wild pixel-art world into a living factory. Gather by hand, automate five industrial tiers, explore for powerful optional upgrades, and master belts, pipes, power grids, rovers, trains and nuclear energyβ€”solo or in online co-op for up to 8 players.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Not stated
Reviews
94% of 17

Build a ship. Load the cannons. Let the chaos begin! Jump into online PvP regattas and naval battles, unlock powerful upgrades, and rule the seas. A well-built ship is the key to victory!

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ Not stated
Reviews
95% of 215

Decorate your dream frutiger home in this cozy co-op frutiger aero house decorating game. Pick a home layout, add from a wide range of frutiger-themed decor and hang out with your friends!

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Free
Released
Price
Free
Players
πŸ‘₯ Not stated
Reviews
54% of 31

The only goal is survival. Explore a dangerous world, gather resources, craft equipment, build shelter, and fight to stay alive. Whether alone or with friends, every decision could mean the difference between thriving and losing everything.

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