This is a guide for the fourth part of the Hunter and Hunted mission which is called Derelict Building. It explains how to get through the Derelict Building with the maximum amount of score by recovering the evidence and remaining undetected on the hardest, purist, difficulty. After completing all the challenges for the Hunter and Hunted mission and completing the Derelict Building in the way this guide describes you will get 20,700 score for the Derelict Building.
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Recover the Evidence
At the start follow the corridor and go into the room with the rubble in it as soon as the corridor splits up. Go into the next room and take cover on the part of the right wall sticking out:
And wait for a police officer to walk past. After he has, go through the doorway the police officer came through and follow the corridor to the second intersection and take cover on the left wall just before it and wait for the police officer at the other end of the branching corridor to have turned and walked out of sight:
Then go down the corridor and go through the hole in the wall up the unbroken section of stairs ahead. Go up the stairs as far as possible then turn towards the wall and jump up the the ledge and pull yourself up. Follow the ledge all the way to the right and go into the room ahead. There is a body in that room. Dump it to distract the police officers. Then go into the room next to the current room which is a bathroom and go up to the edge on the other side of the room and wait for a police officer with a shotgun to go past:
Evade the Police and Get to the Exit
Then go down the corridor to the right towards the cabinet. Once you get to it enter it. Wait for a police officer with a flashlight to have walked past the cabinet down the corridor:
Get out of the cabinet and hide on the side of the half wall ahead not facing the corridor and wait for the police officer with the shotgun to have gone away again, then turn around and go up the stairs. Go to the back wall of the first platform and jump up to the ledge. Pull yourself up and follow the ledge all the way to the left. The exit door is just ahead. Once you have gone through it, it is the end of the Derelict Building part of the Hunter and Hunted mission.