Retro Active gathers B-sides, outtakes and half-finished recordings Def Leppard had sitting in the archive between 1984 and 1993; some were completed or re-recorded for the release. The best-known track is Two Steps Behind, a hit through the Last Action Hero soundtrack and included here in both acoustic and electric versions. Miss You in a Heartbeat, Desert Song, Fractured Love and the Alice Cooper cover From the Inside also turn up. The collection originally appeared in 1993, between Adrenalize and Slang. This edition is a 2-LP on black vinyl.