The Last of Us DLC is a prequel starring Ellie

Naughty Dog has revealed that the first story expansion for The Last of Us is a prequel titled Left Behind.

The add-on tells the story of Ellie and her best friend Riley, and its set before the events of the full game.

The pair attend a military boarding school in the Boston quarantine zone and you'll see how they react to life-changing events.

"Just as The Last of Us focused on the bond between Ellie and Joel, Left Behind explores the bond between Ellie and Riley through a series of events that will forever change both of their lives," said Naughty Dog.

Players will be controlling Ellie throughout the entirety of Left Behind.

The content will cost $14.99 USD or come free in The Last of Us Season Pass, and it'll launch early 2014.