MTV Games has confirmed that Harmonix is working on Green Day: Rock Band. The reiteration follows the widespread misinterpretation of a Demiurge Studios designer's personal blog post, specifically this line: "Not included in the [VGA] announcement was the fact that Demiurge Studios was working on Green Day: Rock Band." A spokesperson for the publisher told Joystiq in a statement, "Green Day: Rock Band is being developed by Harmonix in partnership with Demiurge, MK12 and others." This is not Demiurge's first time working with Harmonix on Rock Band: the studio had also previously worked on the Rock Band Country Track Pack and the Rock Band Metal Track Pack.