I'm not even finished one play-through of this act yet. I just had to say that there is a single moment in this that is more than worth the price of admission. I audibly gasped, hand over my mouth. I can't remember the last time a game made me feel like this.
In that moment, other visual novels would give you a way out. Other visual novels would have faded to black and told you to go back to whatever poor decision you made that led you to this tragedy. This one just keeps on rolling forward, forcing you to deal with the fallout of something you can't prevent.
I think back to the scenes before it and how well it was all planned to make the player's stomach drop. Horrifying and brilliant.