The two teenage girls actually get to be teenage girls, and in doing so, we get to see Ellie shirk the responsibility that comes with simply living in this new, dark world. It's filled with light moments of laughter and fun, with highlights like a halloween store and a photo booth. The pair explore the mall and its riches, making their way deeper into its heart while examining their own. The Riley portion is unique as the better portion of it is a quiet look at kids being kids. Both tell a similar tale, though they run opposite as opposed to parallel to one another. To help make these changes more apparent, the setting of each section is a mall, each torn and broken by both the ravages of time and the horrid nature of the Cordyceps fungus. Naughty Dog hops back and forth between the two time periods, using the different experiences to both highlight the changes that have occurred in Ellie, and cement the parts of her that remain the same. The second is the time directly after when Joel and Ellie leave the university, with the onset of winter directly upon them. The first is a prequel, taking place in the weeks leading up to her meeting Joel, and dealing specifically with her best friend Riley. Left Behind is an Ellie story, dropping us into two defining moments of her journey. While we shouldn't be surprised by Naughty Dog's ability to weave a gripping narrative, this piece of story DLC transcends being simply extra. My favorite game of last year, it was a tense, unforgettable experience, one that I didn't think could be duplicated, much less improved upon. If you listened to our GOTY podcasts, I made no secret about my feelings towards The Last of Us. If you want to avoid spoilers of any kind, I'll save you the trouble of going any further: You need to play this. Spoilers ahead: While I don't spoil anything essential to either the main story, or the DLC, understand that this piece deals directly with events in The Last of Us.