Infernus
Discography

Year
Title
Band
1993
A Sorcery Written in Blood
Gorgoroth
1994
Promo '94
Gorgoroth
1994
Pentagram
Gorgoroth
1996
Antichrist
Gorgoroth
1996
The Last Tormentor
Gorgoroth
1996
Borknagar
Borknagar
1997
Under the Sign of Hell
Gorgoroth
1997
Desekrator Demo
Desekrator
1998
Metal for Demons
Desekrator
1998
Destroyer
Gorgoroth
1999
Hot in the City/Overdose/Take Us to the Pub
Desekrator
2000
Incipit Satan
Gorgoroth
2002
Demo 2002
Orcustus
2003
World Dirtnap
Orcustus
2003
Twilight of the Idols
Gorgoroth
2005
Wrathrash
Orcustus
2005
A Norwegian Hail to Von
Norwegian Evil
2006
Ad Majorem Sathanas Gloriam
Gorgoroth
2007
Bergen 1996
Gorgoroth
2008
Black Mass Krakow 2004
Gorgoroth
2008
True Norwegian Black Metal - Live in Grieghallen
Gorgoroth
2009
Orcustus
Orcustus
2009
Quantos Possunt ad Satanitatem Trahunt
Gorgoroth
2011
Under the Sign of Hell 2011
Gorgoroth
2015
Instinctus Bestialis
Gorgoroth

Question: What were the work of Infernus between 1998-2000 for Gorgoroth?
Answer: Infernus worked for two Gorgoroth albums, Destroyer (1998) and Incipit Satan (2000).