Member:
1990- Carpathian Forest - vocals (as R. Nattefrost)  
2000- World Destroyer - bass, guitars, keyboards, vocals  
2003- Nattefrost - all instruments, vocals (as Hellcommander Nattefrost)  
2011- Kreft - vocals  
Studio musician:
2005 Disiplin - vocals (as Nattefrost)  
Live musician:
2005 Taake - vocals (as Nattefrost)  
2007 Shining - vocals (as Nattefrost)  
Guest musician:
2000 Green Carnation - vocals (as Nattefrost)  
2003 Aborym - vocals (as Nattefrost)  
2004 Aura Noir - vocals (as Nattefrost)  
2005 Taake - vocals (as Nattefrost)  
2016 Urgehal - vocals (as Nattefrost)