Sign of the Hammer is the fourth studio album by the American heavy metal band Manowar, released in October 1984 by 10/Virgin Records.

[5] Written by Joey DeMaio, it is one of the songs from Manowar that explores Norse mythology, which would be recurring throughout their repertoire.

[2][9] Writing for Classic Rock, Ken "Sleazegrinder" McIntyre was favorable, calling the album "gonzo metal", highlighting tracks like "Guyana (Cult of the Damned)", "All Men Play on 10" and "Animals".

[6] McIntyre observes that in "Guyana", Eric Adams treats the "sordid affair" as a "night in the opera".

[6] Similarly, Colin Larkin wrote that Sign of the Hammer contains accessible compositions and called the guitar works of Ross "The Boss" Friedman "excellent", rating the album three out of five stars.