Fragile (Darksun feat. Ralf Scheepers)
The Hunter (Derdian feat. Ralf Scheepers)
Metal Unity (Edge of Thorns feat. Ralf Scheepers)
Architect of Hope (Empires of Eden feat. Ralf Scheepers)
Friend or a Foe (Europica feat. Ralf Scheepers)
Strong Hand & Worrying Face (Europica feat. Ralf Scheepers)
Exciter (Gamma Ray feat. Ralf Scheepers)
Blink (Graveshadow feat. Ralf Scheepers)
Spread Your Fire (Heleno Vale's Soulspell feat. Ripper Owens & Ralf Scheepers)
Roots Run Deep (Immortal Guardian feat. Ralf Scheepers)
Enemies of Fun (Kai Hansen feat. Ralf Scheepers & Piet Sielck)
Sanctified with Dynamite (Powerwolf feat. Ralf Scheepers)
Remission of Sin (Ralf Scheepers feat. Tim 'Ripper' Owens)
Puppet on a String (Scanner & Ralf Scheepers)
Spread Your Fire (Soulspell feat. Tim 'Ripper' Owens & Ralf Scheepers)
Nature of Evil (Tribuzy feat. Ralf Scheepers & Mat Sinner)
The Grand Design (Vanish feat. Ralf Scheepers)
Wheel of Fortune (Winter & Ralf Scheepers)
You Will Never Be Our God (Xandria feat. Ralf Scheepers)