- last post: 01.01.0001 12:00 AM PDT
It's probably to build suspense, becasue the chanting is probably for like other people said for amazement/mysteriousness(someone correct my spelling), just look at how the music is used, its used in the singleplayer campagin as well. It's kinda makes you scared when your in the later levels going down a hall that looks empty with that music playing, you don't know what might happen.