Posted by: JamesLongstreet
I'd say the Flood theme. Not "Devils... Monsters...", but the the "ambient" Flood theme that crops up from time to time, like when you activate the light bridge on the level "Halo".
This. and also most the assualt room songs, and the library songs. My favorite is either perhance to dream or lost song
[Edited on 11.23.2010 10:12 PM PST]