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 11–20 of 213 games matching RTS · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
0% of 1

Guard your campfire through the night and feed your rivals' rifts with monsters. A multiplayer tower-defense survival hybrid where deck building, base building, and dueling economies decide who survives and who freezes.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
0% of 1

Heroes of Might and Magic‑style exploration combined with Three‑Kingdoms siege gameplay. Legendary Chinese heroes gather across time. Supports single‑player challenges, free‑for‑all multiplayer and team‑based combat. No tedious governance, fast‑paced and visceral battles.

If you loved these, you'll love this

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

A deep 2D strategy of cosmic trade and faction warfare. Build trading empires, refine asteroids, lead fleets into battle and run faction politics — solo or in four-player co-op

Free
Released
Price
Free
Players
👥 Not stated
Reviews
75% of 49

“没有挂机,没有轻松——国风硬核修仙,胜者飞升!”踏入《 问道长歌》,进入一个真正的残酷修仙世界!没有自动寻路,也没有满屏逼氪,一切靠操作与策略说话。探索上古遗迹、夺取神秘法宝、与仙魔妖兽殊死搏斗——弱者被淘汰,强者独占巅峰。真实战斗、残酷争夺、自由冒险,这里只有敢于挑战极限的修仙者才能飞升成仙,体验硬核非凡修仙!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
91% of 12

Type to survive! "Typing Clash" is a fast-paced strategy battle game where every word summons units and every keystroke shapes the battlefield. Build your army, unleash powerful skills, and out-type your opponents in chaotic real-time battles.

$$
Released
Price
$$ · Standard
Players
👥 2–10 players
Reviews
26% of 23

IAH: INTERNET WAR is a tactical roguelite combining turn-based strategy and resource management with real-time squad combat. Explore a labyrinth of website-filled rooms, customize combat bots, and fight ZENDAR CORP solo or in online co-op for 2 to 10 players.

$$
Released
Price
$$ · Standard
Players
👥 2–8 players
Reviews
100% of 4

Tower defense on rails. Wake the last war-train in a steampunk world that needs you: build your armored consist car by car, bristle it with turrets, and harvest fuel on the move as you hold the line across a vibrant frontier. Capture towns, upgrade your train, and follow a lone survivor onward.