Harmonix, developers of the blockbuster Guitar Hero® and Rock Band™ franchises, are delivering Rock Band™ 2, a continuation of the Rock Band platform that lets audiences of all ages experience and interact with music in an all-new way. Rock Band 2 lets players vicariously jam out as some of the best guitarists, bassists, drummers and singers of all time. Rock Band 2 delivers the most authentic and ambitious music game to date – by challenging rockers to master lead guitar, bass guitar, drums and vocals with a polished, streamlined, and amazingly fun and challenging experience. Rock Band 2 features a track list that puts all other music games to shame with more than 100 on disc and free downloadable tracks from some of the most hallowed bands of the rock pantheon.

Source - www.us.playstation.com