Extremoduro, a Spanish hard rock band formed in the late '80s by singer/guitarist Roberto Iniesta, gained early recognition with their 1992 release Deltoya under local label DRO. The band's 1996 album Agíla marked a breakthrough, leading to increasing popularity throughout the 2000s. In 2008, their album La Ley Innata reached number one in Spain, surpassing Metallica's Death Magnetic. Extremoduro continued their success with subsequent albums, including Material Defectuoso in 2011 and Para Todos Los Publicos in 2013, both achieving top chart positions and extended chart presence.
Known for their rough image and controversial themes, Extremoduro's music resonated with audiences, solidifying their status as a prominent figure in the Spanish hard rock scene.