Some friends and I were trying to come up with some way to speedrun the game, and we came up with a run where you have to get a kill as every class in an offline training server. The rules/options we're working with right now are as follows: Stock weapons only; 12-player lobby; easy bots; Viaduct. These are of course open to change. I hope you consider adding this as a category, as with the current resurgence of TF2's popularity and the lack of categories, I think this might catch on.