The Last of Us: Left Behind Single Player DLC Announced
The DLC lets you take control of Ellie for the whole campaign and is set before the events in the main game.
"Ashley Johnson reprises her role as Ellie in The Last of Us: Left Behind single-player DLC, Left Behind takes place while Ellie is attending a military boarding school in the Boston quarantine zone, prior to meeting Joel and the events in the main campaign of The Last of Us."
"Joining Ellie on this new adventure is Riley, her best friend and also a mentor of sorts at the military boarding school. 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."