http://www.youtube.com/watch?v=1F5viAtfCwo&hd=1

"Onslaught is the first downloadable content pack available for Call of Duty®: Ghosts. Take the fight onto four small to medium Multiplayer maps: Fog, Bayview, Containment, and Ignition, a reimagining of the classic map Scrapyard from Call of Duty®: Modern Warfare® 2. Players also gain access to the Maverick, an all-new dual purpose Assault Rifle & Sniper Rifle.

The Extinction storyline continues with Episode 1: Nightfall, the first installment in a four-part episodic narrative. Explore a remote facility in the Alaskan wilderness and learn more about the origins of the alien threat. Episode 1: Nightfall features two all-new species of aliens and an exclusive weapon."