Manfred Ehlert (msc), Marc Storace (vcl), plus some others incl. Glenn Hughes (vcl).
Hughes and Ehlert met in Switzerland and Hughes recorded lead vocals for one of Ehlert's tracks. Hughes also sings on Ehlert's earlier albums Amen I and Aguilar (Amen III).
Albums & singles
Amen II [cd] : Europe 1996?