Online co-op RTS games

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

Showing 41–50 of 213 games matching RTS · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
73% of 68

"Collapsing World" is an innovative tower defense game blending deck-building and roguelike mechanics. Recruit unique companions, craft powerful skill decks, and tackle randomized stages. Deep strategy breaks the traditional TD mold—every run is a fresh challenge!

Free
Released
Price
Free
Players
👥 Not stated
Reviews
63% of 38

A real-time strategy military game that lets you directly command your units, with no build times and impressive 3D visuals. Set in a post‑apocalyptic Europe - form alliances with other commanders, fight for resources and territory and rise in honor as a war commander.

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
👥 Up to 4 players
Reviews
92% of 150

Namako (Sea cucumbers) will save the Earth—NAMAKORIUM is a chaotic, cooperative multiplayer RTS game for up to four players. Command the “cleaners of the sea” —Namako left behind by humanity and work together to clean up the polluted oceans!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated

Our Last Stand is a tower defence game that allows you to command a powerful mech and defend against relentless waves of enemies. Play on different worlds to gather resources, unlock advanced technology, and level your commander to gain powerful new abilities. Build defend, survive.

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
83% of 833

Take the helm as a new Station Commander and exploit an alien star system in this stunning space-station factory automation game. Amass resources and construct starships using increasingly advanced manufacturing and expand your station in a hostile universe.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 6

Experience a thrilling fusion of skill-based 1v1 Kung Fu combat and real-time strategy. Command a diverse army—from mighty Sumos and agile Ninjas to legendary Kung Fu Masters—seize territory, manage resources, and unleash special attacks to crush your opponents and claim victory!

$$
Released
Price
$$ · Standard
Players
👥 Up to 16 players
Reviews
93% of 214

Build your base, prepare your troops, and face your most epic battle yet in this old-school real-time strategy game. Choose between two factions, test your skills in three epic campaigns and engage in online battles with up to 16 players simultaneously.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
93% of 275

Command drones, deploy mobile air defense systems and conduct tactical aerial operations. Choose your side - Ukrainian or Russian forces - and protect critical infrastructure in a realistic military simulation on a detailed map.

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$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
94% of 34

Sköllorn is a fast-paced, minimalist RTS where the map itself is your weapon. Sever supply lanes, forge new fronts, and wield one of five asymmetric commander doctrines across procedurally generated galaxies. Solo or up to 8-player skirmishes — no two wars are ever the same.

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