Attack on Titan (2013)

Long ago, the final survivors of humanity were driven to seek refuge within the towering walls of a fortified city, fleeing from the colossal, man-eating Titans that prowled the lands beyond. Only the courageous Scouting Legion ventured outside these protective barriers, yet few of these valiant fighters ever made it back alive. Inside the city, people held onto the fragile hope of a peaceful life—until that hope was brutally shattered, leaving them with a terrifying reality: to kill or be consumed!