マーク・グリーンウェイ
Cerebral Fix – Death Erotica – backing vocals on "Never Again"
Leng Tch'e – Hypomanic – Guest vocals on "Totalitarian"
The Haunted – Revolver – cameo appearance on "No Compromise" music video
Cephalic Carnage – Anomalies – backing vocals
Ginger – A Break in the Weather – backing vocals on "The Dying Art of the Chorus"
Dream Theater – International Fan Club Christmas CD – vocals on cover of Metallica's "Damage Inc."
Withered – Foile Circulare – backing vocals on "...The Faded Breath" and "Clamor Beneath"
This Is Menace – The Scene Is Dead – vocals on "Beg for Silence"