With The Last of Us we got to see the events that led to who Joel is in the game. We never get to see that with Ellie, we’re picking her up at the outset of the journey. What this DLC really allowed us to do is focus on Ellie’s life prior to that journey and we can see that she’s just a kid ultimately. Despite the journey she’s about to go on, you get to see her have fun and you get to see her playing with her best friend and you get to see her being romantic with someone. - Neil Druckman on Left Behind.