The alternative version of ACT 3 is in and can be played by using the cheating room. It should be able to be reached natively too, but I have not had time to test this properly yet. 

If you do, please let me know if you got in. Rack up your hatescore, do not save the fish, get Deerhunter X, get King of Hatred, say something positive about Arthur when prompted to by the campfire in the scene in the forest before the Jackalope boss at the end of ACT 2. 

Haterun act 3 changes the Sarah parts of the regular version of act 3 to a certain degree and completely replaces the Billy parts. New bosses, new enemies, some familiar things but revamped. Hope you enjoy the misery. 

Next up is the final ending of chapter 1: the punisher ending, and then it is finally time to get to some serious polishing and completing the morality system. 

If you want to watch the act instead you can do so here: