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 421–430 of 577 games matching Building · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
74% of 27

Journey with your friends in the free to play world of Ferromon Together and take on the 10 towers with over 140 Ferromon to save the world's inhabitants from the Tainted!

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
93% of 15

Build your ultimate defense with a combination of powerful towers. Attack your opponent with strong Invaders. This game is sure to offer a unique and immersive experience for all tower defense enthusiasts!

$$
Released
Price
$$ · Standard
Players
👥 Up to 16 players
Reviews
75% of 605

Developed by the creator of the original Kerbal Space Program, KitHack Model Club is a physics-based model building sandbox that offers limitless freedom for you and your friends. Design, build, battle, fly (and crash!) your very own RC vehicles, or experiment with over 2,400 ready-made vehicles!

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
76% of 17

A new look at tower defense, full of dynamics and tactics! A terrible virus has struck humanity. You will have to build defenses with your friends or alone and fight off the hordes of zombies who want to get to you.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
88% of 471

Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm. Upgrade and adapt your defenses. Become a master maze crafter. Collect bizarre artifacts. Rush creeps for lucrative rewards, and succumb to greed!

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
58% of 232

Eden Island is a beautiful survival game. As a survivor, you will explore and survive on a realistic tropical island, craft weapons against beasts, farm and hunt, build your own home.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
73% of 211

Bring the traditional market experience to the modern world! Arrange vegetables and fruits on stalls and fulfill customer orders. Set prices, hire staff, and expand your market. Online orders, home delivery, and much more coming soon.

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$
Released
Price
$ · Cheap
Players
👥 Up to 9 players
Reviews
61% of 121

Last Whisper Survival is a cooperative zombie survival game where exploration of the open world is key. As you venture further, you'll need to upgrade your gear and level up your character and skill tree to handle the increasing challenges as you move through the world.

If you loved these, you'll love this