All Hope Is Gone is the fourth studio album by American heavy metal band Slipknot. Released on August 20, 2008 by Roadrunner Records, the album was published in two versions: the standard album in a CD case and a special edition packaged in a six-fold digipak containing three bonus tracks, a 40 page booklet, and a bonus DVD with a documentary of the album's recording. Preparation for the album began in 2007, while recording started in February 2008 in the band's home state of Iowa. Before the album's launch, Slipknot released a series of promotional images and audio samples from the album through various websites. All Hope Is Gone is considered the band's most eclectic-sounding album, incorporating elements from their previous three. The album shows Slipknot completely abandoning the nu metal genre, moving to a groove metal style.