Xbox One: Rock Band 4Rock Band 4 represents Harmonix's return to the franchise after an almost three year hiatus, following the diminishing popularity of the rhythm game market that started in 2009. Announced on March 5, 2015, Rock Band 4 will refocus on the core gameplay of the franchise, reducing the emphasis on musical instruction that was employed by its predecessor, Rock Band 3, while emphasizing the game's social interactions.