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 the encroaching forces of chaos, 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.