Green Day is going digital. Harmonix is releasing a version of the Rock Band virtual guitar-playing video game next year featuring the band's music. Some songs from the band's latest album, 21st Century Breakdown, were playable on Rock Band as add-on songs, but frontman Billy Joe Armstrong tells MTV he's now "excited to now be working on a game spanning our entire career. "We want people to fire this up, choose their favorite tracks and feel what it's like to perform on stage as Green Day." (More Green Day stories.)