Stay a while and listen
The town and the first dungeon songs are really good in my opinion and I also really enjoy the intro song and the tune when being in the hell levels. The whole atmosphere of those songs are great with medieval/gothic type of melodies and some with plain evil music. The other songs, Catacombs and Caves, are a bit ambient but with a few melodic parts here and there, one of them contains an electric guitar. I think it is a soundtrack that grows more and more so it requires atleast a couple of listenings before it can be fully appreciated, atleast it was that way for me.