Following November's teaser trailer a new video has surfaced for the forthcoming single-player downloadable content expansion for acclaimed PlayStation 3 exclusive The Last of Us.

Unfortunately, the new details are presently exclusive to IGN, so you'll have to suffer their temperamental flash player to watch it, but they do also have some additional details courtesy of an interview with actor Yaani King, who is voicing the DLC's new key character Riley.

With Left Behind, the very first (and perhaps only) single-player DLC created for The Last of Us, gamers will be reintroduced to one such character they came to adore – the brave, bold young girl named Ellie – and an all-new character, her trusted friend Riley.

...In The Last of Us, we hear a bit about Ellie’s experience at the quarantine’s boarding school, but we never actually get a taste of it. King expanded on what actually goes on there. “On the surface, we’re being protected from the Infected [at the school],” she explained. “[The powers that be] have us there kind of learning how to basically, at a certain age, fight the Infected at some point. So, it’s pretty boring. It’s kind of like what you’d imagine military school would be: wake up, eat, chores around the quarantine, learning how to protect yourself, and that sort of thing.”

“But it’s very strict,” she continued. “I feel like it’s more about control over these kids than it is really teaching them anything or helping them in any way.”

It seems that getting out of the boarding school – and the quarantine itself – to see the unkempt, post-apocalyptic world around Riley and Ellie is the motivation for the events of Left Behind. And since gamers will play as Ellie throughout the experience, Left Behind has a markedly different feel than The Last of Us’ core campaign.

A release date for Left Behind has yet to be announced, but Sony has confirmed that it has been priced at US$14.99 and will require that players own The Last of Us in order to play it.