Howlies MarloweC, I have a feeling I know what it is that you're missing. The Halloween events have been pushed to the very end of each main story route. They're still there, you just won't see them until much later in the story. I hope this helps.
Viewing post in Returning player; what has changed?
Well, the events at the end of each section aren't something I've seen before, so I don't think that's it. It does seem like things are not in the same order, though, and the inclusion of those events in between sections could be why it seems that way.
e.g., the fight scene against the cops where Hyper reverts to dog form. I remember that... except in my memory, it was not against the cops, it was with Dagio at the very beginning of the game. I also seem to recall actually needing to play out the fight with Dagio.