Editing Rob Halford (section)

===Guest appearances===
* [[Krokus (band)|Krokus]] – ''[[Headhunter (album)|Headhunter]]'' – backing vocals on "Ready to Burn" (1983)
* Surgical Steel – ''Surgical Steel'' (demo), vocals on "Smooth and Fast" (1984)
* ''[[Hear 'n Aid]]'' (1986)
* Recorded the song "Light comes out of Black" with [[Pantera]] for the ''[[Buffy the Vampire Slayer (film)#Soundtrack|Buffy the Vampire Slayer]]'' soundtrack (1992)
* [[Ugly Kid Joe]] – ''[[America's Least Wanted]]'' – backing vocals on "Goddamn Devil" (1992)
* [[Skid Row (American band)|Skid Row]] – ''[[B-Side Ourselves]]'' – vocals on "Delivering the Goods" in a live version (1992)
* Background vocals on the song "Hex 'n' Sex" for the album with the same title by the German band Brings (1993)
* [[Bullring Brummies]], a studio session line-up that came together to contribute to the ''[[Nativity in Black]]'' tribute compilation album of Black Sabbath cover songs (1994)
* [[Queens of the Stone Age]] – ''[[Rated R (Queens of the Stone Age album)|Rated R]]'' – vocals on "[[Feel Good Hit of the Summer]]" (2000)
* Furious IV – ''Is That You?'' (2002)
* ''[[Spun]]'' motion picture (2002) – "Pornclerk" character
* ''[[Brütal Legend]]'' (2009) – Voicing the main villain Emperor Doviculus' minion General Lionwhyte, who is strongly based on the culture of [[glam metal]]. Also voiced the leader of the Fire Barons, who was directly modelled after his younger appearance
* [[Five Finger Death Punch]]'s album ''[[The Wrong Side of Heaven and the Righteous Side of Hell, Volume 1]]'' (2013) – guest vocals on "[[Lift Me Up (Five Finger Death Punch song)|Lift Me Up]]", performed live in Revolver Golden God Awards (2013)
* [[Ronnie James Dio]] tribute album, ''[[Ronnie James Dio – This Is Your Life|This Is Your Life]]'' (2014) – vocals on "[[Man on the Silver Mountain]]"
* ''[[The Simpsons]]'' – Singing a rendition of "Breaking the Law" titled "Respecting the Law" in the episode "[[Steal This Episode]]" (2014)
* [[In This Moment]]'s album ''[[Ritual (In This Moment album)|Ritual]]'' (2017) – vocals on "Black Wedding"
* [[Phil Campbell (musician)|Phil Campbell]] – ''[[Old Lions Still Roar]]'' (2019) – vocals on "Straight Up"
* [[Dolly Parton]], ''[[Rockstar (Dolly Parton album)|Rockstar]]'' (2023) - featured vocals on "Bygones"