I noticed that difficulty settings are only present when setting up a private match. Why are there no difficulty settings on public matches like there are for Arcade Mode?
As I do not have any mates who play Gears regularly, its going to be almost impossible to get the medal "For the Horde! - Complete all 50 waves of Horde on Casual, Normal, Hardcore, and Insane." as I won't be able to set up 'Private' matches.