There is no doubt that Harmonix and MTV Games' Rock Band (Xbox 360, PlayStation 3, Wii) is enjoying quite a bit of success. It seems that the game has reached two new milestones.

According to announcements made by Harmonix and MTV Games, Rock Band now has a catalogue of 200 downloadable songs. In addition, it was also revealed that over 12 million tracks have been sold.

In spite of this, Harmonix doesn't seem to be content to rest on their laurels. The company has promised that it will continue releasing more content for the Rock Band including more full albums for the game.

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