Roger Tiegs, better known by his stage name Infernus, is a Norwegian black metal musician and Satanist. He is the sole founding member and chief ideologist of the black metal band Gorgoroth, formed in 1992, in addition to being the founder and head of Forces of Satan Records. While mainly a guitarist, Infernus has also participated as bassist, drummer and vocalist on several recordings released both by Gorgoroth and other bands.