Freedom Call is a German power metal band formed in 1998. The band tours regularly and the current line-up includes one original member, lead vocalist and songwriter, Chris Bay. Freedom Call has released 14 albums in total, eleven of these studio albums.

Gamma Ray is a German power metal band from Hamburg, founded and fronted by Kai Hansen after his departure from power metal band Helloween, in 1989. He is the band's lead vocalist, guitarist and chief songwriter. Between 1990 and 2014, Gamma Ray recorded eleven studio albums.