The song is the title track to the band's 12th studio album which was released last Friday, September 11th and is the veteran thrash band's first release without late guitarist Jeff Hanneman, who died in May of 2013.

The "Repentless" video was filmed at the Los Angeles area woman's prison Sybil Brand Institute and features Danny Trejo ("Machete," "From Dusk Till Dawn"), Tony Moran ("Halloween's" Michael Myers, "American Poltergeist"), Derek Mears ("Predators," "Friday the 13th") Tyler Mane ("Halloween") Jason Trost ("Hatchet III"), Sean Whalen ("Men In Black," "Halloween II"), and Vernon Wells ("Mad Max 2," "Commando," "Weird Science").