London based Progressive Metal band founded by Andrzej Czaplewski and Claudia Moscoso in 2020. The band started cooperating with drummer Jerry Sadowski, who had already shared stage with Andrzej. He was later asked to join ATAN as a permanent member. In 2021, after successfully recording ATAN’s debut album "Ugly Monster", bassist Marcin Palider was asked to join the band.

ATAN's music presents unique blend of styles. Djenty riffs, and odd time signatures played on 7 and 8 string guitars and eclectic vocal harmonies in style from extreme to gentle throughout their songs.