KMFDM's final album starts out with a bitter goodbye on the title track, and the usual mechanical sonic assault continues on tracks like "Witness," the Kraftwerk-inspired "R.U.OK?," and "Full Worm Garden." Some songs are more club/dance than industrial; "Today" depicts a calmer eye before "Rubicon" and "Bereit" resume the high energy and aggressive stormy ambience that are the band's trademark. KMFDM sound smoother yet maintain their emotive mayhem in all its glory. ~ Gina Boldman, All Music Guide
Adios, the eleventh studio album released by KMFDM, was originally conceived as the group's parting shot to its longtime record label, Wax Trax! Records, but it ended up also signaling the break-up of KMFDM itself, at least for a time. Recorded in Seattle, Washington this was the last album to feature En Esch and Günter Schulz, who both went on to form Slick Idiot. Following the break-up, founding member Sascha Konietzko created the band MDFMK, before reforming KMFDM in 2002 without Esch or Schulz.
For a short period of time in 1999, any copy of Adios purchased through the official online KMFDM store was signed by Konietzko and Tim Skold.
The album was released on April 20, 1999, on the same date the Columbine High School massacre took place. Eric Harris and Dylan Klebold, the two perpretators of the massacre, were both avid KMFDM fans. Eric Harris noted the coincidence of the album's title and release date in his journal.
A digitally remastered reissue of Adios was released on May 8, 2007, along with Symbols.