It's a close one between 2 and 3. 2 feels like a more "complete" chapter, telling only one focused, internalized narrative arc, while chapter 3 doesn't feel quite as self contained; that last section after the "Duck" thing feels almost out of place after everything that had happened since then (though I don't blame the writers too much, it would have been too short of a chapter if it had just ended there).
I still have to go with three though. It's the chapter that definitely had shocking moment after shocking moment of things you don't often see in other stories. The game definitely became it's own unique "thing" during that section.
Still though, I can't say that any of the chapters in particular were weak. There were a couple moments in chapter 4 that bugged me (Ben is dumb, but not quite dumb enough to un-barracade a door), but each chapter is quality and still different enough from each other to create some great variety across the board.
I still have to go with three though. It's the chapter that definitely had shocking moment after shocking moment of things you don't often see in other stories. The game definitely became it's own unique "thing" during that section.
Still though, I can't say that any of the chapters in particular were weak. There were a couple moments in chapter 4 that bugged me (Ben is dumb, but not quite dumb enough to un-barracade a door), but each chapter is quality and still different enough from each other to create some great variety across the board.