>>712729736
So you didn't even play 3/16 of the chapters. The third chapter takes place in a zeppelin with commandos with guns and the final boss is a fat guy in a cyborg suit shooting lasers. The games are full of that stuff. The first game has several chapters where you mainly fight the modern army (helicopters etc).
It was a little jarring for me too, when in one of the cutscenes there's just a guy in a civilian trench coat and fedora standing next to a demon emperor, and they're scheming together.