Sid Meier's Civilization is a turn-based strategy game series where players build and manage a civilization from ancient times to the modern era. Players explore the map, gather resources, and develop technologies while competing against other civilizations controlled by the computer or other players. The game emphasizes strategic planning, diplomacy, and military tactics. Players can choose different leaders, each with unique abilities, and make decisions that affect their civilization's growth and success. The series has received critical acclaim for its depth and complexity, making it a popular choice among strategy game enthusiasts.