Here is opening gameplay from The Last of Us single player demo.

"Survive an apocalypse on Earth in The Last of Us, a PlayStation 3-exclusive title by Naughty Dog. You will find abandoned cities reclaimed by nature. Here is a population decimated by a modern plague and there are only survivors killing each other for food, weapons, or whatever they can get their hands on. Here, you find no hope.

Joel, a brutal survivor, and Ellie, a brave young teenage girl who is wise beyond her years, must work together if they hope to survive their journey across the US."