Microsoft Corp. has sold 600,000 of its new Xbox 360 video game consoles in the United States since its November launch, reports Reuters

The Xbox 360 debuted to much fanfare on November 22 in North America. Since then it has been in short supply. Analysts, video game publishers and retailers have said shipments during the key holiday season fell short of expectations.

Microsoft said in a statement that its challenge has been to meet consumer demand for the Xbox 360. The company, which did not comment on the NPD numbers, said its manufacturing facilities are running at full capacity and that a third manufacturer will come online next month.