 The Blackening received critical acclaim. Blabbermouth.net reviewer Don Kaye awarded the album an almost perfect score of 9.5 out of 10, saying: "one of the purest, finest, most powerful expressions of modern heavy metal released". Kaye praised the guitar work of Flynn and Demmel on the tracks "Beautiful Mourning" and "Aesthetics of Hate", and thought the band members surpassed their musical ability in an "intense and dynamic way".
