Well, here's an oldy coldy.
Not sure many people will care much about this, but I think it's kinda cool.
I'm ripping my collection for archiving purposes, and the program I'm using, dBpoweramp, will reveal these hidden tracks (to my delight) when ripping. The one mentioned above on The Forsaken is just a slightly different, shorter version of "Det Tapte Liv" from the EP of the same name...however, there's also one on The Defeat of Satan, as Track 00, and it's not anywhere else. It's over 8 min long and is very dark, foreboding, and dreamlike/creepy. Fun stuff. Great lyrics, too...once you reverse it. Yes, it's backwards, originally.
Just thought I'd share. If some of you have the Defeat of Satan disc, try it out. It compliments the album, for sure.