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 11–20 of 60 games matching 4X · updated 12 Oct 2026

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WarBoard: Arena Empire is a turn-based tactical strategy game on a hex arena. Command Rome, the Turks, Vikings, Egypt, Japan or Persia. Play solo against AI, or battle up to 4 Steam friends in private matches. Every move counts.

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50% of 4

Turn-based grand strategy in the Age of Discovery. Develop a transport network, industrialise your economy, colonise the New World, and compete with five rival powers. Inspired by Imperialism 2. Early Access — built by one developer in his spare time.

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92% of 115

Riftborne is a classic terminal based, real time, grand strategy game. Construct space ships. Take part in factional warfare. Hire galactic hit-men on your rivals. Raid neighbors for rare resources. Train spies to infiltrate enemy bases for key intel. Grow your empire to dominate the galaxy.

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89% of 857

A turn-based sci-fi strategy that combines exploration and exciting clashes on the battlefield. Take control over several different species, raise powerful armies for your heroes and destroy your opponents! This HoMM-like is set in a scifi universe, with new mechanics on top of the classic formula.

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77% of 92

A 2D multiplayer sandbox game revolving around industry, innovation, factions, combat and emergent gameplay. Design factories, customize tools and weapons, fight or trade with other players or get viciously murdered by an angry badger.

If you loved these, you'll love this

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👥 Up to 4 players
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71% of 1,261

A Souls-inspired action RPG set in a sandbox open world with an MMO feel and challenging directional combat. Play solo or with up to 3 friends in co-op. Build friendships, master an unrestricted class system, and uncover the cause that darkened all eyes.

If you loved these, you'll love this

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66% of 3

Conquer. Build. Survive. A tactical strategy game on procedural hex grids - intense, deep. Plan every move: establish your base, secure supply lines, and unleash suppression fire against all who stand in your way. Research new technologies - improve your units. Play solo, co-op, or PvP.

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$$$ · Expensive
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66% of 24,623

Use war, trade or diplomacy to satisfy your grandest ambitions and dominate five centuries of history in the newest version of Europa Universalis, Paradox Interactive's flagship historical grand strategy game.

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100% of 5

Set in a world seized by machines, Mordfield Command is a turn-based hex wargame. Reclaim territory under mounting pressure and expand your control of the battlefield. Move too slowly, and the Algorithm’s growing forces will overrun you.