NG+
i might be wrong here - so correct me if i am, but NG+ classic (if there is one) wouldn't really be any quicker, as in classic there aren't any upgrades or anything, so it kinda removes the added speed of NG+....
I am new here, so I just wanted to add information, but trust the moderators who do this a lot more. If you beat Classic, you can upgrade on other difficulties, then carry those back to Classic NG+. May not add a category but at least info for people who like running harder difficulties because it will change the time.
Recent runs