The third piece of downloadable content for Call of Duty: Black Ops has now been released on Xbox Live Marketplace. It clocks in at 766MB and will cost 1200 Microsoft Points.
Included in the pack, which is a timed exclusive for the Xbox 360 platform, you will get four new competitive maps: Hanger 18, Drive-In, Silo and Hazard. To compliment this, there is also a new map for the game's zombie mode called Shangri-La.
There's currently no word on when the pack will launch on either the PlayStation 3 or the PC, but it should be in a month or two - so be patient.