This appears to refer to a collected, repackaged archive (RAR) of Nena’s discography covering 1983–2003. Nena is the German pop rock singer best known internationally for the 1983 hit “99 Luftballons” (and its English version “99 Red Balloons”). A repack labeled “1983–2003 RAR repack” would typically include studio albums, singles, remixes, live recordings, B-sides, and possibly rarities and promotional tracks from that 20-year span, compressed into one downloadable archive.
This period saw her experiment with different genres, from rock-leaning anthems to softer, more experimental pop. The 20th Anniversary Revival (2002–2003) nena discography 19832003rar repack