Soundgarden will celebrate the 20th anniversary of their fourth studio album Superunknown with a multi-disc special edition of the record. The album will be reissued in a two-CD deluxe edition, with one featuring the remastered version of the album, and the other packed with demos, rehearsals, B-sides and more. Vinyl options are also available.

The super deluxe package comes with the deluxe album along with three additional CD’s, with the first featuring nine demos from the Superunknown sessions. The second CD offers fifteen tracks from rehearsals prior to the band’s world tour and the final disc is a Blu-Ray audio 5.1 surround sound mix of Superunknown with bonus tracks. Fans will also receive a hardbound book with liner notes by Rolling Stone’s David Fricke along with never-before-seen photos by Kevin Westerberg and reimagined album art by artist Josh Graham.

Soundgarden is also readying the release of five 10-inch vinyl’s featuring all five singles from the album—“Spoonman,” “The Day I Tried To Live,” “Black Hole Sun,” “My Wave” and “Fell On Black Days.” The vinyls will be available for Record Store Day on April 19 and will also include additional B-sides. All tracklist information and purchasing details can be found at Soundgarden’s website.

Superunknown is widely regarded as Soundgarden’s breakthrough album, debuting at number one on the Billboard 200 and selling over 300,000 copies in its opening week. “Spoonman” and “Black Hole Sun” both took home Grammy Awards in 1995, vaulting Soundgarden to mainstream success. To this day, Superunknown remains Soundgarden’s most popular album, selling over nine million copies worldwide.

In anticipation of the release, the band has posted the rehearsal audio of “The Day I Tried To Live.”