Instinctus Bestialis is the ninth full-length studio album by Norwegian black metal act Gorgoroth. It was released on 8 June 2015 by Soulseller Records. This album is the first to stray away from the black metal style and go for a straightforward blackened death metal sound comparable to that of Behemoth. It was also released digitally, as well as on digipak CD in a limited first pressing, limited black vinyl LP and limited picture vinyl LP.[10][11] It is the first album to feature vocalist Atterigner and was the last to feature bassist Bøddel, who died from cancer four months after the album's release.