Complex sentence: The two united to create the "Gruesome Twosome Tour" which spanned 17 co-headlining dates across North America, 3 festival appearances and an appearance at the "Revolver" Golden Gods Awards ceremony.
Split into simpler sentences: The two united to create the "Gruesome Twosome Tour" which spanned 17 co-headlining dates across North America. In addition, Zombie performed 3 festival dates and performed at the "Revolver" Golden Gods Awards ceremony.