Online co-op 4X games

Every online co-op 4X game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 41–50 of 60 games matching 4X · updated 12 Oct 2026

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
60% of 10

Engage in real-time battles with customizable space warships. Explore the galaxy, forge alliances, develop powerful ships, and defeat alien invaders.

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$$$
Released
Price
$$$ · Expensive
Players
👥 Up to 10 players
Reviews
82% of 7,203

Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.

Free
Released
Price
Free
Players
👥 Not stated
Reviews
55% of 49

Abandoned MMO set in Pirates world. Absolutely FREE! NO in-app purchases, you can find gems by killing monsters. NO premium content. Official ABANDONWARE: no updates, no bug fixes, no improvements, no support, no empty promises. The game provided AS IS.

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$$
Released
Price
$$ · Standard
Players
👥 2–8 players
Reviews
90% of 887

eXplore, eXpand, eXploit, eXterminate, EXPRESS. All of the depth, diplomacy, conflict and conquest of a turn-based 4X epic but played in fast-paced 60-minute competitive sessions. Play Solo or Multiplayer for 2-8 players.

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$$$
Released
Price
$$$ · Expensive
Players
👥 Not stated
Reviews
90% of 1,701

In Dominions 6 you take control of a powerful being that rules a nation and aspires to godhood. The type of Pretender Gods can vary from magically powerful arch mages to old dragons or an enormous tree. Dominions is a deep 4x turn based strategy game with a very large variety of spells and units.

$$$
Released
Price
$$$ · Expensive
Players
👥 Not stated
Reviews
72% of 2,225

Take command of a civilization that has just achieved faster-than-light travel in Galactic Civilizations IV, the newest entry in the award-winning space 4X strategy game series. Explore the galaxy, colonize worlds, shape cultures, make alliances, fight wars and pioneer new technologies.

$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
83% of 1,237

Hexarchy is an innovative, fast-paced, historical 4x strategy game where you use cards and deckbuilding to make your decisions. Single-player and online multiplayer.

Free
Released
Price
Free
Players
👥 Not stated
Reviews
50% of 8

不看战报,不走回合,即时战斗的策略国战游戏!突破传统SLG游戏的战报式、回合制的战斗模式,采用即时战斗,让战斗不再局限于简单的数值对碰,不再是轮流操作的缓慢战斗过程;上百三国名将阵型战法自由搭配,战场内武将带兵即时战斗,超100战斗单位同屏独立作战,演义气势恢弘战争大戏。

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