Three saves. Unzip and leave them in the same folder as the .exe (be sure to take them out of the zipped folder).
6: Lost to both sisters but was spared. I don't know why but this doesn't unlock them in the gallery viewer. Dev said this route will be for some later plans.
8: Defeated both sisters.
9: Save for the lazy. You'll be in the gallery room with the 2 new grills unlocked.
I like the old art more but it is what it is.