Yeah, but not really unknown bands and mostly their 80s albums, for example:
Iron Maiden
Slayer
Metallica
Kreator
Helloween
Megadeth
Pantera
Anthrax
Sepultura
Queensrÿche
Dio
And some older pioneering stuff like:
Led Zeppelin
Deep Purple
Black Sabbath
And finally some newer stuff:
Tool
Dream Theater
Rage Against the Machine
Nevermore