In the demo (and in full) version you can find a bonus – Dossier on Riddler (Human Question). You can find it in two places:
1. At the very beginning after massacre with bandits, find the ventilation grille with the help of “detective mode” and break it down, then climb there and find the “Riddler Prize” bonus.
2. After dealing with the ground (the guy who took hostages to the hostage), after his defeat and after the video, go to the right and turn right again, using the “detective mode”, and find a ventilation grid, there is a “Riddler Prize”.