Land of the Dead (2005)

In this new tale, Romero creates a vision of a modern-day world where the walking dead roam an uninhabited wasteland and the living try to lead "normal" lives in a walled city. A new society has been built by a handful of ruthless opportunists, who live in the towers of a skyscraper, high above the existence on the streets below. But outside the city walls, an army of the dead is evolving. Inside, anarchy is on the rise. With the very survival of the city at stake, a group of hardened mercenaries is called into action to protect the living from an army of the dead.

Official website: http://www.landofthedeadmovie.net/