The Messenger now has a new game plus mode thanks to its latest update. You’ll need to 100% the game to unlock it, but after doing so you’ll be able to replay the entire thing on a harder difficulty and with all of your stuff from the previous playthrough.
So uh, how do I activate this new mode? How can I tell whether I have 100%, for that matter? I’ve gotten all the green seals and beaten the game, but I’m not seeing the New Game Plus option anywhere.