The Rock Band Network is a downloadable content service designed by Harmonix Music Systems with the help of Microsoft to allow musical artists and record labels to make their music available as playable tracks for the Rock Band series of rhythm video games. It was designed to allow more music to be incorporated into Rock Band than Harmonix themselves could produce for the games, and it is seen as a way to further expand the games' music catalog into a wide variety of genres. The Network started closed beta testing in September 2009, and an open beta test in January 2010. The Rock Band Network Store was publicly available on March 4, 2010 for all Xbox 360 players in selected countries (US, Canada, UK, France, Italy, Germany, Spain, Sweden, and Singapore). Rock Band Network songs will be exc