27 Diplomacy Indie games your group can play together online, including Age of History 2: Definitive Edition, Nexus Legacy, and Global Protocol: New World Order.
All games: 24
The grand strategy classic returns with improved gameplay, a massive 13,892 province map, expanded diplomacy and wartime capitulation, new civilizations and scenarios, atomic weapons, smarter AI, enhanced visuals, UI upgrades, and major performance improvements.
Rebuild civilization from a single planet in Nexus Legacy, a persistent sci-fi 4X MMO. Colonize worlds, manage resources, research technologies, command fleets, forge alliances, and fight for control of a living galaxy.
Lead any of 221 countries through a living 2026 world in this data-driven grand strategy game. Shape economies, politics and alliances, wage conventional or nuclear war, run covert operations, and rewrite the global order—alone or online with up to seven friends.
An approachable turn-based grand strategy sandbox. Lead a nation, forge alliances, wage wars and rewrite history. Play solo or with friends, create your own maps and scenarios, and explore community mods on Steam Workshop.
A casual airline management game set on Earth and Mars. Supports singleplayer and Steam co-op.
Capture and upgrade planets, outsmart your enemies, and conquer the galaxy! Simple yet addicting, you can play alone or outsmart your friends in this 2D top-down space RTS. Completely free, no monetization, just fun!
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.
Take the Infernal Throne in this hellish turn-based grand strategy game. The Prince of Darkness has vanished, leaving Archfiends to conspire: muster your legions while intoning dark sorceries, devilish schemes, and machiavellian plots. Who will be the new ruler of Hell and ascend the Throne?
The year is 1510. As wars rage across Europe, Africa, and the Middle East, it is the age of gunpowder and mercenaries - that changed the course of history. You can do it as well, going from a leader of men to the ruler of an empire in this unique mix of RTS and grand strategy.
Lawgivers II is a political sandbox game that features multiple electoral systems, approve/reject bills and govern a country. Start out your career from the very bottom, and perhaps one day, lead your nation to become the most influential in the world.
Take your rightful place on the throne in this multiplayer-only party game for 4+ players. Rule the kingdom with an iron fist or silver tongue as you steer through bloodshed, intrigue & madcap disaster! Can you keep your crown when others plot your downfall? More importantly, can you keep your head?
Geopolitical management game with real-time shifting borders and a streamlined gameplay, designed to minimize all burdensome chores while allowing an absolute strategic control, from military recruitment and deployment, to diplomatic and economic management.
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.
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.
Build a civilization of real people, working together to advance society and stop a meteor, all without destroying the ecosystem in the process.
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.
FIRST STRIKE is a fast paced real time strategy game where you play one of the twelve biggest nuclear superpowers of the world – from known superpowers like the USA to an upstart hellraiser like North Korea – and try to be the last one remaining when the whole world blows to smithereens.
Build a city, Create an Empire! Research 400+ technologies, and Build 70+ buildings, Craft and Trade 380+ items in an entirely player driven market. Fight Wars and Forge Alliances with thousands of players and create your own Empire in this award-winning, critically-acclaimed MMO.
Multiplayer is designed for up to ten players, with online and LAN co-op or PvP modes; build empires together against AI rivals and choose from six factions and several match endings.
Command one of six world regions as radar, fleets, bombers, and nuclear silos turn DEFCON's tense alliance game into a contest to lose the least.
Rewrite medieval history through bloody siege combat in a fusion of RTS and Grand Strategy genres. Rule, build, and serve your King as a minor lord in medieval Europe. Experience siege, field and naval combat with an unseen degree of brutality. Rogue-like progression, epic towns and battles await…
Betray your friends- and lie your way to victory. Inspired by popular multiplayer social-deduction party games such as Werewolves and Among Us, this is a new take on the concept with realtime gameplay and interaction.
A game of diplomacy and war in the atomic age. Safeguard your closest allies and change unfavorable regimes without giving away your long-term ambitions. Every action risks an enemy reprisal, and if nobody backs down from a standoff, we all lose.
It's 1347, the time of the Hundred Years' War. In this historical grand strategy and RTS hybrid you play as one of 200 minor lords across medieval Europe, Africa or Middle East. Rise up to take over your Kingdom and be crowned, then fight to preserve your empire as Black Death descends on Europe.