Formed in 1991, Deranged is a very peculiar band in the Swedish scene: unlike bands such as Grave, Entombed and Dismember, Deranged does not have the more melodic Swedish sound their contemporaries are known for and plays a very fast and technical deathgrind with several groove influences.
The band have released the singles The Confessions of a Necrophile -title directly extracted of the movie- (1992) and Upon the Medical Slab (1994), the EPs The Confessions Continue (1993), Architects of Perversions (1994) and Sculpture of the Dead (1996) and the albums Rated X (1995), High on Blood (1998), III (2000), Deranged (2001), Plainfield Cemetery (2002), Obscenities in B-Flat (2006), The Redlight Murder Case (2008) and Cut, Carve, Rip, Serve (2011).
Throughout the years, the band suffered several drastic changes in the line-up and in November 2007, the original members were Rikard Wermén (drums) and Axel Johansson (guitar).
In March 2008, Wermén left the band, which disbanded in July after several problems between Axelsson and Martin Schönherr.
In August 2011, Schönherr left the band, leaving Ahlgren to handle the vocals for a second Russian tour and the Rock in Solo festival in Indonesia.