Start with an SP12 Shotgun and any silent pistol. When you begin, jump out and shoot the policeman next to the counter. Make sure that nobody sees you. Then, go to him and take his gun. Next, go to the men's bathroom and wait until the pizza boy enters. Kill him and take his clothes. Get out of the bathroom and go to the laundry room. Wait till the policeman that sits directly outside of the door goes into it all the way. Then, run in and go into the room he is in and shoot him. Go across to the police department and go to the locker that has the "!" on it. Get the Smoke Bomb from it. Leave and return to the laundry room. Place the bomb down the shaft. Go to the fire department and wait until the firefighters leave and take the costume laying on the table. along with a Fire Ax. Do not run -- go through the scanners. If it goes off notice that they do not do anything, because they think it is the ax. Go the elevator on the right side. Enter and go down to the basement. Sneak into the office and shoot them both, then quickly run down the stairs beyond the door. Keep going until you reach the pick lock door. When you open it, go into stealth mode (tap L1) and get past the chips without stepping on them. When you get directly next to the man at the computer, hit him with the ax. When done, go back upstairs and shoot the computer to the left then quickly go into the elevator. You will be awarded a Total Ninja ranking.