I had an idea that maybe players could be able to see all the game types; normal through hell, as long as you have unlocked that game difficulty, along with a filter to be able to turn off and on the visibility of games you do or don't want to see. For example, if a player in hell mode wants to see nightmare games but not normal games or only hell games there is a one-click way to do that in an options tab somewhere. Just a thought.