Me and a friend are wanting to do a multi-player all advancements run, but there is no category for it. Would it be possible to add a category for multiplayer all advancements?

My advice would be to do a run of it anyways, that way it adds credibility to the category. I doubt anyone would add a category if no runs were ever made of it.

True, we were planning on trying it soon, we'll probably just do that. Thanks!