Downloads for the Call of Duty: World at War Map Pack 1 have surpassed two million sales, according to publisher Activision.
"This is a huge milestone and we are so appreciative of our incredibly supportive community who continue to play and enjoy the game," said Mark Lamia, studio head of developer Treyarch.
"We're hard at work on Call of Duty: World at War Map Pack 2 and look forward to delivering that in June."
Figures are for downloads across the PlayStation Network and Xbox Live services.