Paradox Interactive

Stellaris

"Explore a vast galaxy full of wonder! Paradox Development Studio, makers of the Crusader Kings and Europa Universalis series presents Stellaris, an evolution of the grand strategy genre with space exploration at its core."

This game is a great strategy full of diplomacy, and war! Start from the beginning and than research and expand your empire to hopefully take and conquer the entire galaxy.

Crusader Kings II

Take the role of a King, Queen, Count, or Duke in Medieval Europe. Expand your demesne and secure the future of your dynasty for generations to come. Fill your coffers, appoint vassals, root out traitors and heretics, introduce laws and interact with hundreds of nobles, each with their own agenda.

Crusader Kings

Europe is in turmoil. The lands are fragmented into petty fiefs and the Emperor struggles with the Pope. At this very moment the Pope has declared that those who go to liberate the Holy Land will be freed of all sins.

Gather prestige and piety and the world will whisper your name in awe. Will you co-opt other monarchs, and the Pope, under your leadership to liberate the Holy Land? Do you have what it takes to become a Crusader King?

Galactic Civilizations I: Ultimate Edition

Galactic Civilizations is a turn-based strategy video game developed by Stardock. The game is a remake of a vintage OS/2 series of the same name. An expansion pack entitled Altarian Prophecy was released. The goal of the game is to eventually dominate the galaxy. It is possible to achieve victory through war, cultural domination, diplomacy or by developing overwhelming advanced technology.

Cities in Motion

The goal of the game is to implement and improve a public transport system in 4 European cities - Amsterdam, Berlin, Helsinki and Vienna. This goal can be achieved by building lines for metro trains, trams, boats, buses and helicopters.

Majesty 2: The Fantasy Kingdom Sim

Another 3D "russian revival" of a 2D cult classic, Majesty 2 is a fast-paced RTS featuring indirect control over units: you place gold-ladden flags for heroes to pick up and attack/defend a target or explore/avoid an area. Core gameplay is simple and fast, but plan your building wisely, because enemies are everywhere and your tax collectors are frail creatures. Balance is not the game's forte and difficulty is a bit punishing at times, but resource files are pretty easy to cheat-mod...

Mount & Blade

This is a sandbox combat simulator specializing in large battles. Indie developer!
Hand-to-hand, horse combat, castle sieges, that kind of thing.