Demos for the album had been made but before the band could properly begin recording it, guitaristDenis D'Amour (a.k.a. Piggy) died on August 25, 2005 due to colon cancer. The guitar and bass tracks for Katorz were recorded by D'Amour and bassistJason Newsted (formerly of Metallica) on D'Amour's Mac at Newsted's house in California. After D'Amour's death, Langevin and Bélanger recorded their drum and vocal tracks, respectively, to be added to those existing tracks. The song, "The X-Stream", is included in Guitar Hero II.