The NPD Group has announced its tracking results for new U.S. retail video game sales in August, showing overall revenues for the industry dropping ten percent compared to the same month last year. Overall industry sales for the month were down $91.4 million from last year, to $818.9 million for the month. Hardware sales dropped five percent ($14.7 million) year-over-year to $282.9 million for the month, while software sales were down 14 percent ($67.7 million) ...