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 11–20 of 110 games matching Action RTS · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
100% of 4

Fast real-time space conquest for 1-4 players. Capture planets, launch missile salvos, and outmaneuver friends in 10-minute Deathmatch blitzes — or scheme through 30 minutes of diplomacy, trade and betrayal in Hegemony mode. Cross-play with mobile; bots fill empty seats so a match always starts.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
75% of 69

To protect the magical Lifestone, you must strategise, manage and build a fortified settlement. Lead your fellow survivors into battle against waves of nocturnal monsters who wish to take this precious Lifestone from your world.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
49% of 1,051

Company of Heroes 3: Final Stand delivers a standalone roguelite wave-defense experience for solo and cooperative play. Command and survive against fast-paced escalating enemy waves, intimidating bosses, and dynamic battlefield events. Are you ready to make your final stand?

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$$$
Released
Price
$$$ · Expensive
Players
👥 Up to 2 players
Reviews
77% of 1,256

ZeroSpace is a hybrid sci-fi RTS / RPG game that allows you to play as the commander of The Protectorate, a galactic force dedicated to securing humanity’s place in the galaxy. The Orion sector is locked in a vicious power struggle between many alien factions, ready to fight to the death.

Free
Released
Price
Free
Players
👥 Not stated
Reviews
33% of 6

Build your kingdom, train armies, forge alliances, and fight for the throne in Solderia: Fall of Kings, a medieval strategy game where every decision shapes your rise to power.

$
Released
Price
$ · Cheap
Players
👥 2–8 players
Reviews
100% of 1

Broken Crown is a fantasy RTS where you build a settlement, gather resources, research powerful upgrades, and command hundreds of units in formation-based battles. Advance troops through five visual tiers, preserve Bronze-to-Gold veterans, and conquer tactical maps shaped by Fog of War.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 1

In Silent Howl, every night is a fight for survival. Villagers must unmask the Werewolves lurking among them, ready to strike from the shadows. But beware, powerful hidden roles can shift the balance. Will you expose the truth and save the village, or tear it apart from within?

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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.

$
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
$ · 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!