Burzum – Hliðskjálf (1999)

This album is so good that I ripped it and imported it into my game files for TES III: Morrowind. Hliðskjálf builds on the gloomy MIDI-keyboard fantasy realms of Dauði Baldrs, sprawling into more moody and atmospheric keyboard work, which all at once conjure memories of very early Cradle Of Filth, fantasy table-top roleplaying, of course the misty mysteries of Morrowind, and even something altogether more Angelo Badalamenti. I consider the two Burzum prison albums absolute stone cold classics of the dungeon synth genre. It really is difficult to beat this.