When the level starts, immediately run to the brown boxes and wait for the guard to go up the little "hill". Run towards the water and stay along it. Go into the sewer and look at your map. Find the way up the stairs. When you get there, do not go up the steps. There should be four walls that stick out. Find the one that is the darkest and go through it. Then, go up the ladder and head right into the room. Go left and keep running to the next room. The doctors will run, but just keep going. When you cannot go through any more doors, look on the bed and change into the clothes quickly. Go out the way you came from quickly and run. Some of the doors on your right have bathrooms. Find the one that does not have one. Walk out calmly and go to the supply room. Get the door key then go to where the lady you are supposed to kill. When you arrive, there should be two people sitting down. Wait for the nurse to get up and talk to you. Follow her up the stairs and she will take you to the lady in the green. Wait for the nurse to leave and the lady in the green goes to the window. While she is still talking, go up behind her and cut her throat or strangle her. After she dies, drag her out the door and watch out for any patients or innocents. Go straight across the circle so the guards do not see you. Go to the door on the right and put her inside. Walk out calmly and go back all the way you came from. When you reach the end of the sewer where you first entered, watch out for any guards that may be present. When it is clear, run to your motorboat, still in your doctor's clothing.
Start by dropping any rifle that you have and equip, then holster, your Anesthetic. Wait for the nearest bodyguard to go to the nearest narrow passage. Run to the helicopter landing site and go into the sewers. Watch out for the bodyguard patrolling it. Run to the end of the sewers but do not go up the ladder, as the guards will see you. On your right while facing the ladder is a passage. Go there. Watch out for bodyguards, nurses, doctors, or patients that are going your way. Save the game. If you get through this, go to the room on your right. With luck, there will be no one there. If there is, wait for the doctor to go away. Alternately, sneak by the crouch behind him not using anything; he will not even notice you and go away. Go to the last room and change into the doctor's clothes. Walk to the place with the Hitman symbol. Get the door key and poison. Bodyguards will not notice your disguise. Go to the place where Dr. Von Kamprad is located and talk to her. Poison her water first, and when she returns to drink her water she will die. Immediately drag her to the room with the symbols. Walk to your boat and you will receive a Silent Assassin rank without using your weapons. Note: Use the Anesthetic was in emergency situations.
