Aw =( no a capella dudes out of 2 million on PC gamers? And like 6 million console gamers. Well there goes my immersion idea lol, back to 2 hours played in Skyrim and into playing another game.
I stated on another thread, though, that there are some pretty cool a capella choirs out there. (Unfortunately, none that sing Skyrim songs, AFAIK.) I'd recommend Bulgarian folk a capella. You've heard it before. It sounds like women/cats in their death throes. It's used in pretty much every fantasy movie ever. Then there's Gregorian chants, et cetera. Use Amazon to find something you like, then look to the suggestions to find similar things.
Is this close to what you want? I have no idea haha. http://www.youtube.com/watch?v=Lwgeulqt-jI It's not a group though. Just one guy sorry. Closest thing I could find.
Maybe Visa R?ster (hmm, website down?) does requests? Some examples of previous computer music work as a cappella: http://www.youtube.com/watch?v=pdzXuaejtZU http://www.youtube.com/watch?v=411W1vSh_o0 I love this, but then I like music, fun, and yeah I guess I'm really that old - so I can really appreciate this