Most Popular Diplomacy Games on Steam
Unlike generic lists, our game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated diplomacy games.
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Sid Meier's Civilization® V
Create, discover, and download new player-created maps, scenarios, interfaces, and more!
Hearts of Iron IV
Victory is at your fingertips! Your ability to lead your nation is your supreme weapon, the strategy game Hearts of Iron IV lets you take command of any nation in World War II; the most engaging conflict in world history.
Europa Universalis IV
Rule your land and dominate the world with unparalleled freedom, depth and historical accuracy. Write a new history of the world and build an empire for the ages.
Stellaris
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.
Crusader Kings II
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
Total War: SHOGUN 2
Total War: SHOGUN 2 is the perfect mix of real-time and turn-based strategy gaming for newcomers and veterans alike.
Sins of a Solar Empire®: Rebellion
Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.
Age of History II
Age of History II is a grand strategy wargame that is simple to learn yet hard to master.Your objective is to use military tactics and cunning diplomacy to either unify the world, or conquer it.Will the world bleed out or bow before you? The choice is yours..
Victoria 3
Paradox Development Studio invites you to build your ideal society in the tumult of the exciting and transformative 19th century. Balance the competing interests in your society and earn your place in the sun in Victoria 3, one of the most anticipated games in Paradox’s history.
Victoria II
Carefully guide your nation from the era of absolute monarchies in the early 19th century, through expansion and colonization, to finally become a truly great power by the dawn of the 20th century. Victoria II is a grand strategy game played during the colonial era of the 19th century, where the player takes control of a country, guiding...
Dune: Spice Wars
A 4X real-time strategy game from the developers of the critically acclaimed Northgard. Set in Frank Herbert’s groundbreaking Dune universe, you must lead your faction and battle for control and dominance over the harsh desert planet of Arrakis.
ROMANCE OF THE THREE KINGDOMS XIV
Triumph over the land, take charge of the fate of China! Conquer territories and fly your colors!
ENDLESS™ Space - Definitive Edition
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.
Sid Meier's Civilization® III Complete
Sid Meier's Civilization III: Complete, the latest offering in the Sid Meier's Civilization III franchise, provides gaming fans with Sid Meier's Civilization III, the highly-addictive journey of discovery.
Age of History 3
Grand strategy wargame where the destiny of Civilizations rests in your hands - will they stand united under your leadership or fall divided in conflict? Journey through the entire saga of human civilization, from its earliest days to the futuristic era, crafting your legacy age by age.
Total War: ROME REMASTERED
Total War: ROME REMASTERED lets you relive the legacy that defined the award-winning strategy game series. Remastered to 4K with multiple improvements to visuals as well as refinements to gameplay, it’s time to revisit a true classic. Not everyone gets a second chance to conquer the Roman Empire.
HighFleet
Battle for survival in the skies of a mysterious future Earth in this unique action-strategy game mixing arcade combat, exploration, management and diplomacy. As giant flying ships wage spectacular aerial warfare, a prophecy tells of one who will save the world – could it be you?
The Battle of Polytopia
Welcome to the unique, turn-based strategy game set in the strange, flat world of the Square. Lead one of 16 distinct civilizations to victory by expanding your empire, researching technologies, and ultimately become ruler of the world! Play in single-player or multiplayer mode for up to 16 players.
Supremacy: Call of War 1942
Take over the control of one of the mighty nations during the times of World War 2 in this persisting long-term strategy game. Conquer provinces, forge alliances and build up your economy in real-time. Research top secret weapons of World War 2 and become the one true superpower!
Galactic Civilizations® II: Ultimate Edition
Get the complete GalCiv II saga including Galactic Civilizations II: Dread Lords, the expansion pack Dark Avatar, and the newest expansion pack Twilight of the Arnor!
Reign of Guilds
Reign of Guilds — the spiritual successor to the old-school fantasy where steel, magic, and skill decide your fate. Inspired by the legacy of Ultima Online and EverQuest.
Fabledom
Set in a wholesome fairytale world, Fabledom is a laid-back City builder. Enjoy the growth of your settlement, interact with your neighbors and defend your kingdom from magical creatures. All to find true love and live happily ever after!
Terra Invicta
An alien invasion has fractured humanity into seven ideological factions each with a unique vision for the future. Lead your chosen faction to take control of Earth’s nations, expand across the Solar System, and battle enemy fleets in tactical combat.
Rebel Inc: Escalation
A unique and deeply engaging political/military strategic simulation from the creator of Plague Inc. Balance competing civilian and military priorities and deal with a deadly insurgency in order to stabilise a war-torn country.
Democracy 4
Democracy 4 lets you take the role of President / Prime minister, govern the country (choosing its policies, laws and other actions), and both transform the country as you see fit, while trying to retain enough popularity to get re-elected...
Ages of Conflict: World War Simulator
Ages of Conflict is a versatile Map Simulation game where you create and observe custom AI nations battle it out across an infinite number of worlds. Paint beautiful maps and scenarios, and command nations to change history into your liking!
SUPREMACY: WORLD WAR 3
This Long Term Strategy Game lets you take control of the armed forces of your nation. Become responsible for its military expansion, technological research and economic development. Form alliances and wage total war for global dominance on the battlefields of World War 3.
Old World
Old World is a revolutionary new historical strategy game where you lead your dynasty over generations of rule against rival kings and queens. Wage massive wars, manage your court, and build a dynasty — or watch your empire crumble to dust. What legacy will you leave behind?
Pharaoh™: A New Era
The legendary city-builder returns! Lead the creation of one of the greatest civilizations the world has ever seen in this HD remake with modernized UI. Build monuments, manage your population and explore 4,000 years of history through over a hundred hours of gameplay.
NEBULOUS: Fleet Command
Take command of your hand-tailored fleet of space warships and use realistic radar, electronic warfare, advanced movement controls in 3D space, and precision targeting to outmaneuver and outwit your opponents in a simulation-heavy tactical space game like no other.
Supremacy: 1914
Take over the control of one of the mighty nations during the times of World War 1 in the biggest WW1 strategy game of all time. Conquer provinces, forge alliances and build up your economy in real-time on persistent maps. Build experimental weapons of World War 1 and become the one true superpower!
Renowned Explorers: International Society
In this strategic rogue-like you become a famous expedition leader in the 19th century. You form your own crew with the skills and personality to discover legendary treasures, while exploring randomized locations and stories on every new adventure.
Twilight Struggle
Twilight Struggle is a two-player game where players play as either the US or USSR during the Cold War. Using actual events from history, players must plan out their strategies in order to obtain world dominance. Play Twilight Struggle and change the course of history.
Cepheus Protocol
Cepheus Protocol is an Open World RTS Military Survival Game. Play as the CERC hunting Patient 0, maintain Quarantine camps, fight dangerous mutations & Rogue Civilian Combatants . There’s nobody else coming, it’s up to you now.