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 71–80 of 110 games matching Action RTS · updated 12 Oct 2026

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Players
👥 Not stated
Reviews
70% of 44

Stardust Exile is an RTS set in the Milky Way galaxy, containing currently known stars and exoplanets with their real characteristics. The remaining star systems are procedurally generated. It has both online mode and single-player skirmish mode. The online server is persistent and single-shard.

Free
Released
Price
Free
Players
👥 Up to 100 players
Reviews
73% of 19

Deadzone Blackout, the First Game from Mozambique on Steam! Face up to 100 Players, Communicate via VOIP and Activate Your Protection Wall to Dominate the Battlefield. Get Ready for This Intense Shooter Game.

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Players
👥 Up to 2 players
Reviews
100% of 1

Ulia Chronicles is a city-building game set in a fantasy universe. Build your city, gather resources, and make your citizens thrive. Play alone or with your friends in this game inspired by the classics of the genre.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Up to 4 players
Reviews
90% of 20

BioFusion is a VR co-op multiplayer, PvE, first-person-shooter, tower defense game. Swing on a grappling hook, ride a hovercraft, throw grenades, collect buffs, build towers and traps. Do what you must to keep the mutants from the Spores of Evolution.

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$$ · Standard
Players
👥 Not stated
Reviews
91% of 121

Become a master strategist in this physics-based Real-Time Tactics game! Command minifig-inspired armies and customize strategies with hand-drawn formations. Conquer unique campaigns for all five armies and unleash massive battles in both single-player and multiplayer modes. Victory awaits!

$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players

Micro Wars is a fast-paced RTS that throws you into the action in short, intense online battles featuring up to 8 players. Tailor your strategy with a variety of commanders and units, build your base, and micro your way to victory. Hone your skills with the campaign, and then climb the ladder ranks!

$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players
Reviews
80% of 947

Unleash voxel warfare in 9-Bit Armies: A Bit Too Far. Lead a modern military, build bases, unlock units, and attack in all-out war. Engage on land, sea and air in over two dozen missions, online skirmishes, or co-op. Easy to learn, a challenge to master.