The NPD Group has released its monthly U.S. sales figures for hardware and software across all platforms for the month of September. Overall, hardware sales fell 9 percent year-over-year to $349 million, with software sales dipping 1 percent to $653.2 million. Dead Island and Gears of War 3 earned high spots on the sales charts, with Madden NFL 11 taking top honors as highest selling…
