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 121–130 of 213 games matching RTS · updated 12 Oct 2026

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
77% of 269

Eyes of War is a real-time strategy game set in the medieval era, offering both single-player and multiplayer experiences where you can control every unit in character mode. Build your castle, lead your army, and dominate the map. Eyes of War invites you to epic battles of the medieval era!

$$
Released
Price
$$ · Standard
Players
👥 Up to 8 players
Reviews
88% of 4,227

Return of the Classic, now remastered! Battle Realms is a fantasy RTS inspired by the stories told in martial- arts movies and oriental mythology. Develop your peasants into a highly trained and deadly efficient clan of warriors who are ready to die with your name on their lips.

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
91% of 81

This is an open world game on 3D, Also a mission centered survival battle game. It includes role-playing, tactical strategy, experience has Dozens scenes and combat tasks, allowing players to complete tasks and receive rewards. It support multi people cooperation on network.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 12

Elect is a multiplayer political simulation game. Run in elections, join or lead a political party, and vote on laws in the U.S. and 15+ other countries. Become your country's leader and declare wars, send foreign aid, appoint a cabinet, fight pandemics, vote in the United Nations, and more.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
76% of 437

Warlords Under Siege is a mix of RTS and Roguelike genre, where you build a small city and defend it against continuous waves of enemies. Improve your assortment of weapons with each playthrough, unlocking new possibilities to beat the ever-increasing threat.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
69% of 204

In a post-apocalyptic world submerged by the sea, the wake of the enemy is apparent at every turn. From turning the tides of naval warfare to dominating the skies in break-neck aerial combat, every decision you make will change the outcome of the battle.

If you loved these, you'll love this

$$
Released
Price
$$ · Standard
Players
👥 Up to 2 players
Reviews
74% of 9,522

Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
50% of 4

A physics sandbox voxel-based simulation game for you to mess with. Build world you can imagine and destroy anything you create.

$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
100% of 9

A homage to classic real-time strategy games. Gather resources, build an empire, and command powerful armies to conquer the world. Lead six unique tribes, expand your territory, and engage in epic battles with hundreds of units on screen. Dominate in 18 missions and procedurally generated maps!