Online co-op Action RTS games

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

Showing 51–60 of 110 games matching Action RTS · updated 12 Oct 2026

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$$$
Released
Price
$$$ · Expensive
Players
👥 Not stated
Reviews
55% of 26,193

Broken Arrow is a large-scale real-time modern warfare tactics game that combines the complexity of joint-forces wargaming with action-packed real-time tactics gameplay.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Start your world conquest with any faction you choose. Build and upgrade your production buildings. Plan and decide the composition of your army. Create your own ability deck. Challenge legendary boss to a fight. Embark on an immersive story campaign. Play with your friends.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
81% of 318

TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends. Protect your Basin at all costs. An absolute Tower Defense, Real-Time Strategy Hybrid

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 3

SHARP FISTS is an action game that allows players to freely switch weapons and attack modes during combat, using a variety of weapons and skills to perform combo attacks. The highly mobile combat system provides players with a fluid combat experience.

$
Released
Price
$ · Cheap
Players
👥 3–10 players
Reviews
100% of 2

Escape Haunted Mansion is a horrific multiplayer deduction game for 3 to 10 players with voice chat. The Haunteds must complete tasks to escape, while the Cursed seek to eliminate them discreetly.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
51% of 33

Incorporating classic stories such as "Wu Kong", as the descendant of the Three Pure Ones of Taoism, you will step into the fierce disputes among the human world, the demon world, and the god world, a fantasy world that is about to be reborn!

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."