GameStop says sales for the nine week holiday period ending 2009 remained flat compared to last year, reports Edge-Online. The US game retailer added that 2009 revenues represented the second highest earnings in the company’s history, and that flat growth was in comparison to its record-setting sales in 2008. GameStop chief Daniel DeMatteo said this year’s holiday sales were affected by economic weakness, inclement weather in December, and shortages of key products such as Nintendo Wii and the Wii title New Super Mario Bros. along with Sony PlayStation 3 consoles. The retailer reported category sales increases of four percent for new software, and a ten percent increase for used games that still fell below expectations. It said that hardware sales declined eight percent. Read more at Edge-Online.