Masseling's career began in 2005, when he sent a demo tape to DJ Buzz Fuzz, head of BZRK Records. Buzz liked the tape and signed Masseling, who released his first EPs under the name Menace II Society and Angerfist. He quickly gained respect in the nu style gabber/hardcore scene for his uncompromisingly violent and aggressive sound, characterized by bass drums that are extreme even in gabber rations. He also released records under the name Kid Morbid, Bloodcage,Denekamps Gespuis (which was a one-time alias for a gimmick-track) and Roland & Sherman .
The Angerfist-imagery often touches subjects like serial killers and psychopathism: Members of the live crew perform in Jason Voorhees-hockey masks on stage (a gimmick that is also used by Italian hardcore group Art of Fighters and further back by French Gabber artist Dr Macabre in his live performances.
Track titles consist of phrases like Maniac Killa, Murder Incorporated or Criminally Insane, and their official website featured a "Sicko Corner", containing gruesome fan-contributed poetry, which the site claimed to be "a form of art & skill".
March 25, 2006 saw the release of Angerfist's first album, Pissin' Razorbladez, containing a full catalogue of his former hit tracks.
Angerfist has released his new Album, Mutilate, in March 2008, on the Masters of Hardcore label.