Online co-op Base Building games

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

Showing 321–330 of 464 games matching Base Building · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
90% of 20

BioFusion is a VR co-op multiplayer, PvE, first-person-shooter, tower defense game. Swing on a grappling hook, ride a hovercraft, throw grenades, collect buffs, build towers and traps. Do what you must to keep the mutants from the Spores of Evolution.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
63% of 41

Discover, craft, and survive in Wild Planet's captivating open world. Build bases, explore dungeons, and embark on adventures. Immerse yourself in its relaxing atmosphere and uncover the secrets of this mysterious planet!

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
78% of 475

The mayor of Rockhaven threw you down a hole into the Undercity. Why? Net worth too low. In this open-world simulation, you and up to 3 pals will steal, fight, and scheme to reclaim the city. Customise your rides, buy businesses, and take on the Mayor’s forces. Rockhaven is yours for the taking!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
20% of 5

Survive on an open-world island with unlockable abilities that help you on your journey in Gengu Survival. Craft new items as you level up and build your own base wherever you want. But be aware, there is something strange on this island...

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
45% of 222

Imagine DayZ mixed with Escape From Tarkov, but in Low Poly. A persistent world survival game featuring PvP, PvE, crafting, base-building, and zombies infected with a contagious virus.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
72% of 287

You and allies, avian inhabitants of Sanctree City, build structures and production lines on the tree, crafting weapons to fend off subterranean insects. Defense is just the start—dig deeper, destroy nests, fortify new defenses against escalating threats for an impregnable stronghold.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
88% of 1,421

The Last Plague: Blight is an authentic survival experience rooted in realism and immersion. Endure the hazards of a brutal open world, uncover the origins of a mysterious disease, and become humanity’s final hope of ending the Blight.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 3 players
Reviews
90% of 64

Prepare your defenses during the day and survive until dawn. Defender Bros is a Top-Down Tower Defense Roguelike where you play as a Soldier defending your Base. Pick between multiple abilities as you level up to increase you power, then after each run buy perks and get stronger

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