This is the second Rock-O-Rama imprint using the United name. The first was based in England and was used to release Skullhead records and used the SKULL numbering. This version based in Germany uses the UNCD numbering and stylizes the name in an acronym fashion as it appears on some of the disc labels. It is not clear if each letter was intended to stand for anything or if it was simply for looks.
As all of these are in CD-R format, it is nearly impossible to determine exact dates. Some dates are known, others are taken from reliable sources, but the majority are estimated. It is also extremely difficult to determine different pressings. The booklets and inlays were most likely printed in larger quantities than the quantities of discs burned, so one batch of covers could span over several batches of discs.
There are three distinct styles of discs used in this series. The earliest versions would appear to be a blue-green bottom disc with a white printable surface on the top with what appear to be clouds in the background of the top section behind the band name. The next version was a lighter green bottom with a silver-bronze top with the lettering screen printed on it, with the band name in the top section. Finally, there was a similar disc with U.N.I.T.E.D. RECORDS printed in the top section instead of the band name. Recent editions have ink-jet printed covers with a black disc with white printable surface, but these are not included here. One recent edition is included, the latest edition of UNCD 022, as it is a higher quality production than the other black disc editions.
Since different CD-R editions are a murky area at best, they will not be given individual records here. The only exceptions are if there are significant differences between one version and another.