Promotional-only releases do not have their own numbers, although the promotional singles for "Piggy" and "Hurt" were both labeled as "Halo Ten", a title later officially used for Further Down the Spiral.
Promo-only nemajú svoje Halo číslo, hoci promo singel „Piggy“ a „Hurt“ sú označované ako "Halo 10", oficiálne sa však používa pre album Further Down the Spiral.