In late 1998, with the help of session drummer Jonas Mattsson, Silencer released their first professional demo, which was composed of a single, eleven-minute song titled "Death - Pierce Me".
The song "Sterile Nails and Thunderbowels" had a promotional video released for it, which features footage from the 1989 experimental horror film Begotten by E. Elias Merhige.
In 2007, he released a dark ambient solo album called Transformalin, under the project name Diagnose: Lebensgefahr (roughly translated from German as "Diagnosis: Mortal Danger").
Nattramn released a book, Grishjärta (meaning "pig's heart" in Swedish), in 2011, a limited edition work containing his artwork and poetry, and a small selection of new photographs of him – albeit with his face obscured.
[7] In 2006, he worked with the band Zavorash, as composer of the song "Worthlessness" from the album Nihilistic Ascension & Spiritual Death as Andreas Casado.