the kinds of people buying games was changing and they wanted something different. rhythm game developers tried to add new features to their games. "rock band 3" and "" added new stringed guitar controllers. they also added kinds of game play to help players learn how to hold their fingers as if playing a real guitar. despite these new modes, sales of music games were still low in 2010. "guitar hero: warriors of rock" and "dj hero 2" sold only 86,000 and 59,000 copies in north america during their first week of sales, respectively, a sharp contrast to "guitar hero iii" which had seen nearly 1.4 million units in its first week 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. end year sales were less than $300 million.