MTV Games has confirmed that sales of its Rock Band franchise have surpassed the $1 billion USD mark in North America – not bad considering the series launched only 15 months ago.
Citing figures from the NPD Group, the company also revealed that a whopping 40 million tracks have been purchased to date, with Viacom claiming that the series has shipped 10 million units since its inception in November 2007.
NPD added that Rock Band was North America’s number one title for last year in value terms.