Just stumbled upon the various game mode pages. We have pages for Creative and Survival and Peaceful and Difficulty Modes... See Category:Gamemodes . This doesn't really make sense.
I think we should either have only the Creative and Survival Modes, or possibly Creative and each of the various Survival Modes (possibly using subcategories). But the current mess of modes should be cleaned up, I think.
What do you think is the best way to clean it up?