"13" is the sixth studio album by the American rock band Six Feet Under, released on March 22, 2005, through Metal Blade Records. The album features a total of 11 tracks that blend elements of rock and metal, showcasing the band's signature style. With a runtime that captures the essence of heavy riffs and aggressive vocals, "13" reflects the band's evolution within the metal genre. The album's title, "13," aligns with the band's penchant for exploring darker themes and motifs, a hallmark of their discography. Notable tracks include "Ghosts of the Undead" and "Doomsday," which exemplify the raw energy and intensity that Six Feet Under is known for. "13" was well-received in the metal community, contributing to Six Feet Under's reputation as a significant force in the death metal and rock scenes. The production quality and musicianship on this album demonstrate the band's commitment to their craft. As part of their extensive catalog, "13" continues to resonate with fans of heavy music and stands as a notable entry in their body of work.