Through October 2010 , music games achieved net sales of around $ 200 million , one-fifth of the genre 's revenue during the same period in 2008 .
Analysis of music game sales through October 2010 show net sales of around $ 200 million through October , one-fifth of the revenue for music games for the same period in 2008 , and that the market will likely not break $ 400 million by the end of the year .