The German Trance DJ's and Producers Claus Terhoeven ([a=Nic Chagall]) and Stefan Bossems ([a=Bossi]), met in 1997 while they had several releases with different projects for [l=X-IT Records] in Cologne. In November 1998 the duo met by chance in a studio, and decided to do a track together. The end result was a track called "The Drums" and the duo's first exploration in to Hard Trance; Cosmic Gate was born.
At this point the duo was forced to quit their resident DJ jobs to have enough time for remixes, DJ gigs and new productions.
In 2006 they released their third studio album, "Earth Mover" which was very different from previous Cosmic Gate albums as it no longer had the distinctive Hard Trance sound that they were known for. Their sound evolved even further on the fourth album, "Sign Of The Times" (2009) which took a more 'progressive' approach to Trance music, which also reflects the duo's DJ sets.