NME's 20 Heaviest Albums of All Time

"...the bone-crushing weight of this music comes from its atmosphere, the riffs, the oppressiveness of the production and in some cases from the intense personalities (and lyrics) involved. The overpowering density comes at the exact moment during a metal song when your head sinks as if you've been punched in the stomach. The sensation is often derived from brutal simplicity; it relies on introspective, monolithic repetition, meaning that as often as not, very technically gifted musicians often fail to achieve ultimate heaviosity by interrupting true weightiness with fancy frills, fills and curlicues."