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 101–110 of 464 games matching Base Building · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Up to 8 players
Reviews
96% of 30

In this top-down, multiplayer, co-op game, you must protect your Core Crystal by any means necessary. Build up your defenses, explore, refine, and upgrade to reach your goal. Play alone or with up to 8 people.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
60% of 5

Cooperative real time city building simulator with Swiss flair. Build a town together manage resources and budgets solve quirky everyday problems and experience a world that keeps running even when you are offline.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
40% of 57

“Live your Wild West fantasy in Frontier Legends, an open-world frontier adventure where survival, crafting and exploration shape your story. Stake your claim, build your place in the West and uncover what lies beyond the rails.”

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
72% of 159

Shamania is an open world survival game where you can CRAFT, FIGHT, and EXPLORE a vibrant sandbox world with friends in CO-OP. Expand your base as a hub for survival, gather resources, and master professions to unlock new tools and opportunities!

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
85% of 48

Explore, automate, and fight in this new open world factory automation game. Build factories connected by miles of conveyor belts. Manage power and fluid networks. Explore procedurally generated worlds filled with resources to harvest and hostile creatures to defeat. Play solo or online with friends

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$$
Released
Price
$$ · Standard
Players
👥 1–8 players
Reviews
77% of 4,819

Rome has fallen! Rebuild civilization in this action-adventure survival game for 1-8 players. Fight hordes of the walking dead, build settlements, restore the Roman gods... or kick back and farm with friends.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
76% of 13

A deep biological network automation game where you grow a living mycelial network across an alien planet. Consume the local flora and creatures, build biological production chains, and evolve from a tiny spore into a cosmic entity that consumes worlds.

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Free
Released
Price
Free
Players
👥 Up to 2 players
Reviews
94% of 19

Planet Gemini is a factory-building and tower defense game. After crash-landing on two planets during an interdimensional journey, fend off waves of enemies and research a portal to survive.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players
Reviews
88% of 138

Moonshiner Simulator is an in-depth spirits production simulator. Start from the bottom and build your operation into a thriving empire by mastering the intricacies of the craft and creating unique recipes. But beware – there will always be those who want to see you fail.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 14

Shape Together is a factory-building game: lay mines, belts, and machines, automate shapes, and use them to defeat monsters and bosses. Hold back waves, grow stronger over time—solo or with friends on Steam.

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