There is a conversation and sounds at the end of Myth One, and if you cant hear it, it is a bug.
My advice: Email the people at bungie. Repeatedly. If you get no response(cuz they never check their e mail, I know from experience), Then at last resort only, send your complaint to the bungie store. It is the one place where they actually look and respond, but only because the more they sell, the more they make. They will also be considerably less annoyed with you at this if you buy something also, so if you dont have it, get myth II, or a T-shirt or something.
