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 111–120 of 213 games matching RTS · updated 12 Oct 2026

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
68% of 45

东汉末年,天下动荡,群雄并起,在这片风云变幻的乱世中,你将化身一方霸主,自偏安一隅的孤城出发,广揽贤才、经营城政、整军备战、攻城略地。是匡扶汉室,重振中兴?还是割据一方,自立为王?亦或是问鼎中原,君临天下?你的每一次抉择皆可改写这段波澜壮阔的乱世史诗!

Free
Released
Price
Free
Players
👥 Not stated
Reviews
29% of 27

Welcome to a global multiplayer meat grinder. This is a strategy game where you don’t just win — you collectively erase countries from a single, shared world map. Only one nation is allowed to survive!

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$$
Released
Price
$$ · Standard
Players
👥 Up to 3 players
Reviews
87% of 4,045

It's ten years since the infection started. Long-established settlements are collapsing, one by one, for unknown reasons. Survivors are running to the hills to escape, hoping for safety in remote places. As another refugee, you're here to carve out a new life for yourself - by any means necessary.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
81% of 70

A love letter to old-school browser-based RTS MMOs – with charming nostalgic pixel graphics, a dash of political satire, and tonnes of strategic tension. Build your empire, face off against other players, and take what’s yours in true British imperial style: by dominating the map.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 54

PlanetX is a real-time strategy MMO set on a spherical planet. Players expand territories, construct buildings, and manage resources to develop their empire. The ultimate goal is to conquer the entire planet by claiming all land plots and outpacing rivals in strategic growth and domination.

$$$
Released
Price
$$$ · Expensive
Players
👥 Up to 2 players
Reviews
78% of 1,869

ALARM! You have been selected for a mission which will shape the fate of the entire world. Witness the very beginning of the legendary elite WWII force in Commandos: Origins. The long-awaited sequel to the Commandos series brings you right back to the foundation of the real-time tactics genre.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
88% of 84

Real-time dynamic tactics with the strong focus on squad positioning and collaboration. Connect to the warzone from your home PC and orchestrate modern military operations from the Drone Perspective.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
63% of 52

Command one of three unique factions in a post-apocalyptic old-school RTS. Now featuring Patch 0.4.0 -- new mini-campaign and gamemodes."

Free
Released
Price
Free
Players
👥 Not stated
Reviews
39% of 335

From the genre-defining RTS franchise Command & Conquer comes a unique, free-to-play strategic warfare MMO experience!

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 6

Command powerful heroes in this dynamic RTS with PvE and PvP modes. Level up your champions, unleash devastating abilities, and lead your army to victory. Build and manage your base, train diverse units, and master their strengths and weaknesses to outsmart your enemies on the battlefield.