If you want an alternative to GM (I can see why you might want to, but I'd be curious to know how many people see it as a problem), "referee" works well. Has an

If you want an alternative to GM (I can see why you might want to, but I'd be curious to know how many people see it as a problem), "referee" works well. Has an old-school flavor, and because it's an old term it won't really raise any eyebrows or "why don't you just use game master?" questions.