Versions of the game for the PlayStation 2 and Wii platforms were released on December 18, 2008. The software/hardware bundles for the Xbox 360 and PlayStation 3 were made available on October 19, 2008. Rock Band 2 software was released in North America for the Xbox 360 on September 14, 2008, along with individual instrument peripherals, and later for the PlayStation 3 on October 19, 2008. All of these songs, existing and future, are compatible with all Rock Band titles. In addition to the 84 songs included on the game disc and 20 free downloadable songs, over 1400 additional downloadable songs have been released for the Xbox 360, Wii, and PlayStation 3 versions, with more added each week. New features include a 'Drum Trainer' mode, a 'Battle of the Bands' mode, online capabilities for 'World Tour' mode, and merchandising opportunities for the players' virtual bands. Rock Band 2 features improved drum and guitar controllers, while supporting older controllers, as well.

Players are scored on their ability to match scrolling musical ' notes' while playing instruments, or by their ability to match the singer's pitch on vocals. Players can play the lead guitar, bass guitar, and drums parts to songs with 'instrument controllers', as well as sing through a USB microphone. The game allows up to four players to simulate the performance of popular songs by playing with controllers modeled after musical instruments. It is the sequel to Rock Band and is the second title in the series. Rock Band 2 is a 2008 music video game developed by Harmonix, published by MTV Games and distributed by Electronic Arts.

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