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 431–440 of 464 games matching Base Building · updated 12 Oct 2026

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
50% of 4

Create Your Own Universe is a survival, crafting, exploration, base building, third person, open world, go anywhere you see on screen space game.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
75% of 8

You are not immune — you are evolving. Hunted by the infected and feared by the living, survive a brutal open world where every decision shapes your fate.

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$$$
Released
Price
$$$ · Expensive
Players
👥 Up to 70 players
Reviews
60% of 108,174

ARK is reimagined from the ground-up into the next-generation of video game technology with Unreal Engine 5! Form a tribe, tame & breed hundreds of unique dinosaurs and primeval creatures, explore, craft, build, and fight your way to the top of the food-chain. Your new world awaits!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 2

Dive headfirst into the classic era of first-person and third person shooters with "Ground Wars KDR Alpha". Immerse yourself in the heart-pounding action and diverse arsenal that defined the early days of FPS gaming. Engage in awesome multiplayer mayhem across multiple maps.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
82% of 1,604

The RTS/FPS phenomenon has moved into space! Build your base on an asteroid, command fleets of starships for epic battles, pilot fighters, mine and trade resources, assemble robots to defend or assault other stations. Take sole command or share the glory as you fight for control of the quadrant.

$
Released
Price
$ · Cheap
Players
👥 Not stated

Time and space foam island, unknown biological resources, construction base, adventure trip. 1. Build roads. 2. Arrive at space-time foam to obtain rare materials and advanced equipment. 3. Don't leave the road. 4. Demolition or PK. 5. Continuously opening up more features.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 9

Open world, multiplayer online tower defense confrontation game. Fight with teammates to upgrade your heroes, build bases, produce your own troops, command troops to form formations, and defend or attack enemy positions. Come and build your online fortress together.

$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
85% of 1,801

A desert gardening survival game. Start from a tiny spring and cultivate a blooming garden. Explore a vast world amid the sands and uncover its mysteries. Can you defend against the relentless forces of nature and mysterious wraith corruption, to bring life to a dying world?

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