Nödtveidt also performed in several other projects, including The Black (as Rietas), De Infernali, Nifelheim, Ophthalamia (as Shadow), Satanized, Siren's Yell, and Terror, a grindcore band which featured members of At the Gates.
Almost all songs written by the band are connected in some way to this fantasy-world, until their last album, which was inspired by Macbeth.