Reign: Conflict of Nations is a real-time strategy game that takes the player on a journey through three centuries of medieval Europe. The game is developed by Lesta Studio and is available for Windows users. In this game, the player takes on the role of a monarch and controls one of 26 factions. The game requires the player to develop smart economics, work political maneuvers, maintain thoughtful diplomacy, take care of resources, and wage war to succeed.

The game has an elaborate system of building and assigning labor forces in cities, a large selection of scenario-based and random missions, an expansive and realistic technology tree, more than 150 types of military units, and elaborate graphics and animations that bring the war to life. The game is based on a detailed 3D map with an authentic landscape and historically accurate military units. The player can turn a small principality into a large and powerful empire by engaging in a large-scale military campaign. The game also includes political, economic, and role-playing systems that show the intricacies of diplomacy and wars in medieval Europe. The game features great people and personalities of the past, hundreds of game characters, each one with their unique specialties, including rulers, commanders, priests, alchemists, and spies.