In the month of June, U.S. sales of Nintendo’s Super Mario Galaxy 2 for the Wii system reached 548,000 units, according to the independent NPD Group, bringing the game’s cumulative nationwide sales to more than 1.1 million units. Also in June, Nintendo systems sold a combined 933,000 units, accounting for 50 percent of all gaming hardware units sold in the United States. The Nintendo DS family of hand-held systems topped the charts with more than 510,000 units sold, bringing life-to-date unit sales to nearly 42 million. Wii system sales totaled more than 422,000, closing in on a cumulative milestone of 30 million units sold in the United States alone.