The film premiered at the Sundance Film Festival on 23 January 2018. It was released in the United States on 8 February 2019 by Gunpowder &amp; Sky, in the United Kingdom on 29 March 2019 by Arrow Films and in Sweden on 5 April 2019 by Nordisk Film. It received positive reviews from critics, but was met with polarizing reception from audiences within the metal community.