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 181–190 of 577 games matching Building · updated 12 Oct 2026

Filters: Building × Clear all
$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

Command your forces against endless waves of enemies in this intense RTS. Build bases, manage resources, and defend the Omega Beacon across procedurally generated worlds. Play solo or team up with friends via Steam multiplayer.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
73% of 506

Nested Lands is a ruthless medieval RPG game featuring in-depth village building, large-scale social management and combats. Gather survivors, build a settlement, craft, master your skills, survive, and endure alone or in online co-op.

If you loved these, you'll love this

$$$
Released
Price
$$$ · Expensive
Players
👥 Up to 4 players
Reviews
70% of 382

The 20th century heralds the new age of electrification for the railroad, and a new opportunity to make your fortune. Build your corporation carefully, as you deploy modern electric and diesel locomotives, lay new tracks, transport goods and passengers, and stay ahead of the competition.

If you loved these, you'll love this

$$
Released
Price
$$ · 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
Reviews
90% of 313

D&D meets Franchise Manager, Gargadusa’s Tower is a supremely deep guild management simulation that spans generations. Build your adventurer guild from nothing. Recruit heroes, complete quests, and descend the mysterious tower to confront the power that lies within.

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

$$
Released
Price
$$ · Standard
Players
👥 1–4 players
Reviews
85% of 4,040

Roadside Research is a 1 to 4 player co-op gas station simulator. Except you’re aliens. And undercover. Do very human things like restocking shelves while preparing for the invasion. Just don’t get caught.

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
$ · Cheap
Players
👥 Not stated
Reviews
50% of 12,095

Embark on an adventurous journey to explore the Quinfall universe. Be a part of unique battles and an immersive story with dozens of different professions in the depths of medieval times in an all-new MMORPG experience.

If you loved these, you'll love this