Swarth

In their review of the album, Exclaim! described it as the album's style "unique and unorthodox", but noted that it kept to the sound established on Portal's previous albums. They wrote that the album has "an extremely raw feel, with heavily distorted guitar riffs that aid in the album's overall chaotic and apocalyptic atmosphere. The release's eight tracks all contain that same distortion blast anchored by down-tuned rhythms, sharing some black metal aspects."[2]

Professional ratings

Review scores
Source	Rating
AllMusic	[3]
Sputnikmusic	4/5[4]

The album received largely positive reception from music critics. Sputnikmusic praised the performances by every member of the band, and described the album as "claustrophobic", and as "the heaviest, most extreme offering of music to ever be created." NPR Music's Lars Gottrich wrote that "Nothing gave me more nightmares than Portal's 2009 album Swarth", describing the album as "pure audio horror, the kind of abstract death metal record that, while a brilliant feat, is almost something like watching Requiem for a Dream for me — I'm inspired by the experience, but don't revisit it that often."[5] Terrorizer named it the 13th best metal album of 2009.[6]

All music is composed by Portal.

• The Curator – vocals
• Horror Illogium – lead guitar, bass (played on recording,[1] though Omenous Fugue is listed as bassist in the credits)
• Aphotic Mote – rhythm guitar
• Omenous Fugue – bass
• Ignis Fatuus – drums