This Darkened Heart is the second studio album by the heavy metal band All That Remains, released on 23 March 2004. It includes the singles "This Darkened Heart", "Tattered on My Sleeve" and "The Deepest Gray", all three of which had music videos created for them. "This Darkened Heart" is the first album to feature their current rhythm guitarist Mike Martin, last album to feature drummer Michael Bartlett and only album to feature bassist Matt Deis.