Best 4X Strategy Games on Steam

Explore, expand, exploit, exterminate. 4X games hand you a single settlement or a lone colony ship and an entire map to grow into, one turn at a time. They are slow, deep and famously hard to put down, and their achievement lists tend to be huge, rewarding every victory type, faction and odd playstyle. Pick one and lose a weekend.

1

Sid Meier's Civilization VI

The genre's best-known name, building a civilization from a single settler through to the space age. Hundreds of achievements, many tied to winning with specific leaders or in unusual ways.

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2

Stellaris

A space 4X that slides into grand strategy, with real-time pacing, emergent stories and galaxy-ending crises. Its achievements reward strange empires and long campaigns.

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3

Age of Wonders 4

Fantasy empire building where you design your own faction and fight tactical turn-based battles. Achievements cover realms, factions and its campaign-style story realms.

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4

Old World

A historical 4X built around rulers who age, marry and die, with orders as a limited resource each turn. One of the largest achievement lists on this page, much of it tied to its events and nations.

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5

ENDLESS Legend

A fantasy 4X with wildly asymmetric factions, each with its own quest line and way to win. Achievements follow those factions and their stories.

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6

ENDLESS Space 2

A sci-fi 4X from the same studio, with factions that genuinely play differently and a senate that pushes back on your plans. Faction-driven achievements throughout.

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7

HUMANKIND

History as a patchwork: each era you pick a new culture to bolt onto your civilization. Achievements reward fame, cultures and unusual combinations.

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8

Galactic Civilizations III

Classic, sprawling turn-based space empire building with ship design and huge maps. A long list for patient players.

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9

Master of Orion

A modern take on the series that helped define the genre, with voiced races and a cleaner, quicker pace. A good starting point for space 4X.

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Updated 2026-10-05. Every game links to its full SteamVault page with achievement stats, rarity and community completion times.