cheapest i can see these by a few quid
Green Day: Rock Band puts players on stage as multi-platinum selling and Grammy Award winning group Green Day, featuring the band's most-defining albums and key moments throughout their career to date. Players perform vocals, guitar, bass and drums using award-winning Rock Band technology. 3D visuals and archival material give players a unique view into the music and vision of this pioneering band.
* Experience 47 Green Day songs, featuring a collection of greatest hits and two of the most iconic Green Day albums in their entirety
* 3D custom characters featuring likenesses of Green Day members Billie Joe Armstrong, Mike Dirnt, and Tré Cool, as well as select venues and art specific to the band's history
* Full motion-capture utilized to create an authentic Green Day live performance in authentic venues
* Players can play through American Idiot and Dookie as complete albums, capturing two landmark moments in Green Day's career
* 3-part vocal harmonies for those songs featuring multiple singers
* Unlockable prizes as you proceed through the game.
* All Green Day DLC can be imported onto your Green Day game disk, completing a third album - 21st Century Breakdown - and unlocking unique venue visuals and archival materials
* Compatibility - game works with Rock Band and Guitar Hero instruments