So this pretty much confirms human Sektor. They would have no other reason to specify that he's robot. Since he's always been a robot. Also...I've been thinking about the possibility of the mystery red lady being human Sektor....
Oh, also hello everybody! I'm new here :]
Mine were better. Bleh, standard fare. At least they have the "complete a fatality with each character" ones.
The secret Achievements/Trophies belong to the story mode. It's usual in all games because of spoilers.