Microsoft Corp. announced that the Xbox 360 video game and entertainment system has sold over 10 million units in the U.S., making it the first current-generation gaming console to break the 10 million mark in the U.S. The U.S. install base contributes to global sales of over 19 million, more than any other current-generation console.

“This year will be the largest in the history of the video game industry, with Xbox 360 leading the charge in the U.S. and abroad,” said Don Mattrick, senior vice president of the Interactive Entertainment Business in the Entertainment and Devices Division at Microsoft. “History has shown us that the first company to reach 10 million in console sales wins the generation battle. We are uniquely positioned to set a new benchmark for the industry.”

This announcement comes on the heels of one of the biggest entertainment launches in history, “Grand Theft Auto IV,” on April 29, 2008. Gamers eager to experience “Grand Theft Auto IV” online helped boost Xbox LIVE global membership to over 12 million this month. Fueled by an unparalleled combination of access to friends and family, the best online gaming features, and the best entertainment content, the Xbox LIVE service has doubled in membership in only one year’s time.

“Reaching an installed base of 10 million consoles in the U.S. is a significant achievement and an essential milestone on the road to market leadership,” said Billy Pidgeon, research manager at IDC. “Perhaps more important is the Xbox 360 worldwide online base — 12 million Xbox LIVE gamers is the largest community in the connected console games sector, which represents the greatest growth opportunity in the console market and where Microsoft has been the leader for two generations.”