Sony Corp. this week released The Last of Us: Left Behind for the Playstation 3.
The Left Behind DLC includes characters Ellie and Riley in an event set prior to The Last of Us.
It sells at $14.99.
The Last of Us includes survival and action elements amid abandoned cities decimated by a plague.
Users will guide the survivors to journey across the U.S.
Action elements include third-person shooting and contextual melee struggles against enemies.