In its first week of sales, the Call of Duty: World at War "Map Pack 1" set a new sales record on Xbox Live. In just the opening weekend of the pack's release, there were over one million downloads over Xbox Live.
Developed by Treyarch, Call of Duty: World at War, Map Pack 1 leverages the power of Xbox LIVE to deliver the definitive Call of Duty multiplayer experience, putting players in the action as never before. Players fight through the burning streets of Berlin in “Nightfire” and take up battle positions in fortified Japanese bunkers in "Knee Deep." “Station” offers a bombed out underground train station, and the Nazi Zombies return in “Verrückt” (Zombie Asylum), featuring more weapons, new Perks-a-Cola machines and electroshock defenses. With a diverse selection of new environments, Call of Duty: World at War, Map Pack 1 offers hours of exciting action.
You can pick up the map pack for yourself if you head on over to the Xbox Live Marketplace and plunk down the 800MS points ($10 USD) for the Xbox 360 version of the pack.