L.A. Sieben

Leo A. Sieben, alias Anavrin, is a composer who worked on the soundtrack to Final Doom - TNT: Evilution and for Wraith Corporation's double-opus of Perdition's Gate and Hell to Pay. He has been credited as part of the miscellaneous crew for the infamous  and seems to have retired from game development afterwards. He is the brother of Jimmy Sieben (EvilGenius).