The choir was founded in 2016 by Noa Gruman, lead singer of the Israeli metal band Scardust, who also serves as its conductor and musical director.

It comprises approximately 40 singers, and its repertoire includes songs by metal and hard rock bands such as Iron Maiden, Judas Priest, System of a Down, Slipknot, Linkin Park, and others.

[2] Gruman has cited the German bandVan Canto, which mimics the sounds of guitars and other instruments using seven singers and a drummer, as one of the choir's inspirations.

[3] In 2018, Hellscore performed on the main stage of the vocal music festival of Europa Cantat, held in Tallinn, Estonia.

[5] Hellscore regularly accompanies the Israeli band Orphaned Land during their performances in Israel and contributed to their album Unsung Prophets & Dead Messiahs (2018).