But I always liked the surreal desperation of Zach's face-off with the massive fat man who has a Dalmation stitched into the pocket of his overalls. The fact that there's a climactic boss battle at the end might be cliched in a way, but the fact that the boss goes from a slimy alien mutant BACK to his fat man form was awesome. The look on Zach's face when he transforms is really good too.
I agree! The whole three part sequence between Zach and Kayson was my favourite - even the waggle-your-joystick-and-kill-your-wrist-all-the-way-down-the-never-ending-staircase-whilst-doing-awkward-and-fast-QTEs part.
The revelation hit me something fierce and it was very, *very* weird diving instantly into a boss battle with someone you weren't even sure existed until a few moments ago; I'm a little ashamed to say I didn't even like Zach at first! (incredible, I know!)
For my money, yeah, the Kayson Battle(s) - even though Thomas's fight had some of the best music!