Retro Active [SHM-CD] by Def Leppard is a rare tracks compilation released in 1993 as part of the BACK TO 90s ROCK HR/HM series, featuring previously unreleased recordings and non-album B-sides from the band's singles, and it includes the global hit "Two Steps Behind," which was used in the film Last Action Hero, offering fans a valuable opportunity to hear rare material from the band's early period, and this SHM-CD edition comes complete with liner notes, lyrics, and Japanese translations.