Bolt Thrower

Bolt thrower is was a classic Death Metal band from Coventry, England. After releasing their first demo, which was categorized as Grindcore, they decided to release a proper album. Being a bunch of big nerds, they named it Realm of Chaos: Slaves to Darkness and used the original Rogue Trader artwork as their album cover. The album is a concept album about Warhammer 40,000 and it's pretty badass, if you're into that sort of thing. Since the album came out in 1989, it also offers a glimpse into original Warhammer 40k, which is interesting and something most modern players never experienced.