Kingdom Hearts is a popular action role-playing game series developed by Square Enix. It combines characters and settings from Disney films with those from Final Fantasy, creating a unique crossover experience. Players take on the role of Sora, a young hero who travels through various Disney-themed worlds to battle dark creatures known as Heartless. The series is known for its engaging story, memorable characters, and a blend of real-time combat and exploration. Players often team up with iconic Disney characters like Donald Duck and Goofy as they seek to restore light to the universe and uncover the mysteries of the Keyblade and the heart's connection to friendship.