The band has released eleven major studio albums and 7 EPs, as well as many limited editions and revamped material.

Delerium originally intended to release all of that material in a double debut album, but Wilson decided to just pick the songs he considered the best ones.

The album was a departure in style from all their previous works, in favour of a more song-oriented direction, as a consequence this alienated some older fans but brought a lot of new ones.

In Absentia (2002) became one of their most successful works, remaining a favourite to many fans, charting in many European countries and selling over 100,000 copies in its first year of release.

In September 2007, they released Nil Recurring, an EP of four leftover tracks from the recording sessions for Fear of a Blank Planet.

[8] An in-store appearance at Park Avenue CDs in Orlando, Florida from 4 October 2007, was recorded and released on CD under the name of We Lost the Skyline.

Another live album from the Fear of a Blank Planet tour, Atlanta, was released in June 2010 in order to help raise funds for Mick Karn's treatment for cancer.

In November 2021, Wilson, Barbieri and Harrison announced the reunion of the band, now as a trio with Edwin not returning as a bassist.