civilization game, strategy, turn-based, empire building, historical leaders, world map, hexagonal tiles, cities, military units, technology tree, diplomacy, cultural development, wonders of the world, multiplayer, single-player, Sid Meier, Firaxis Games, PC gaming, resource management, trade routes, victory conditions, 4X game, detailed graphics, immersive soundtrack, moddable, expansions, user interface, AI opponents, diverse civilizations, replay value, educational, grand strategy.