MTV Games and Harmonix announced today that the Rock Band franchise has exceeded $1 billion dollars in North American retail sales. This comes over the 15 months of availability of Rock Band and Rock Band 2, according to the NPD Group. Rock Band was also the top revenue producer for 2008.

Additionally, over 40 million paid song downloads have been made during that period. Currently, 614 songs are available in the Rock Band franchise, combining songs both on-disc and available for download, with 11 complete albums available online. These songs have come from 269 different artists/bands.