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 141–150 of 464 games matching Base Building · updated 12 Oct 2026

Filters: Base Building × Clear all
$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
79% of 1,893

Desynced is a sci-fi strategy game with fully customizable units and behaviors. Gather, build, research, and explore the unknown. Alone or with friends, unveil the mystery of an AI on the edge of self-awareness and uncover the hidden truth in this blend of strategy, automation, and exploration.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated

Command a nomadic empire where your base is as mobile as your fleet. Capture vital sectors to dynamically terraform the battlefield. Customize capital ships, issue sector-wide doctrines, and out-macro your foes. You aren’t just fighting on the map—you are rewriting it.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
77% of 92

A 2D multiplayer sandbox game revolving around industry, innovation, factions, combat and emergent gameplay. Design factories, customize tools and weapons, fight or trade with other players or get viciously murdered by an angry badger.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 1–16 players
Reviews
80% of 1,092

Oxygen Train is an open-world survival train game. Wake up in a world lacking oxygen. Chop trees, mine, gather resources, upgrade your unique train. Survive by planting, fishing, farming, exploring, fighting. Build your train kingdom. Supports 1-16 online co-op.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated

Run your own supermarket with your buddy! Set product categories/prices, handle checkout, hire staff, expand your store, source goods, grow & sell crops, build town relations, and become the town’s richest resident!

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
65% of 155

An online multiplayer game of crafting, survival, civilization building, and player collaboration. Start in the stone age and live, build, and invent your way to higher civilization. Live and die as well as you can, to gain the experience you need to achieve even more in your next life!

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
73% of 272

CIRCLE EMPIRES returns! Expand your empire, circle by circle, in this fast-paced follow-up to the hit RTS. Gather resources, build armies, and defeat bosses (or your friends) in a world that changes with every game. With unique units and biomes, it's an addictive battle of wits and tactics.

Free
Released
Price
Free
Players
👥 1–5 players
Reviews
55% of 9

Landiscape is a relaxed 1–4 player open-world survival sandbox set on a zombie-infested island. Build bases, scavenge resources, explore dangerous landmarks, grow crops, and survive together — or turn on your friends.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
84% of 743

From a small village of a dozen people to a small kingdom of thousands of people. Arrange for residents to work, gathering, fishing and hunting, farming and mining, processing and manufacturing. Trade, accumulate supplies, increase your strength, and fight evil forces and monsters.

If you loved these, you'll love this