This Darkened Heart is the second studio album by the metalcore band All That Remains, released on March 23, 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 All That Remains album to feature current rhythm guitarist Mike Martin, the last album to feature drummer Michael Bartlett, and the first album to feature bassist Matt Deis who left the band in 2005 and then rejoined in 2022.

[3][4] Additionally, some of the songs feature clean vocals.

[5] All lyrics are written by Philip Labonte; all music is composed by All That Remains