Soundgarden's Superunknown will be reissued in multiple formats to mark its 20th anniversary.

Up first is a vinyl box set for Record Store Day on April 19th called Superunknown: The Singles that will feature 10-inch versions of all five singles from album. Then on June 3rd Deluxe and Super Deluxe Editions will be released. The Deluxe Edition adds a second disc with demos, rehearsal tracks, B-sides and live songs. The Super Deluxe Edition is a fiv-disc set with a disc of B-sides, a disc of demos, a disc of rehearsal tracks and a Blu-ray with the album remixed in 5.1 surround sound.