Playstation®3
PlayStation® Network
Sign into the PlayStation® Network
Enter the PlayStation® Store via the Playstation® Network icon.
Select “Add-Ons”
Select “Disc-Based Game Add-Ons”
Select the Call of Duty: World at War thumbnail.
Select the Call of Duty: World at War Map Pack 3 thumbnail.
Select “Buy Now”
Map Pack 3 will download