I'm going through Extreme right now, just got to Chapter 3. Bit annoying with how they swamp you with enemies. It's suppose to be hard, but this goes about it in a rather cheap way to me. That and the last pro bending thing will take me awhile, I think. I went through the first three of Ace Bending fairly easily, but man, the difficulty really seemed to spike in that fourth one, couldn't even win a round, had to give it up. Still would like to 100% it, though. Need to spirit bend and some items, still, but they'll come in time I assume.