The Perfect Crime

The Perfect Crime is an achievement/trophy in Dishonored: Death of the Outsider.

How to Acquire
To unlock this achievement, Billie Lurk must steal the Twin-bladed Knife from the Dolores Michaels Deposit & Loan Bank during the mission The Bank Job. In addition, everyone inside the bank must remain asleep and no security systems can be disabled or rewired. It is imperative for this achievement to acquire Poppy Tincture, either from the black market shop in Upper Cyria or at the auction in Colibron Plaza, and drop it on the bank's rooftop ventilation air duct. Calling the Elevator Vault to any floor forces at least one person to wake up, and so the vault has to be crashed down. Guards patrolling outside the bank do not count towards this achievement.

First, enter the bank from the rooftop after dispersing the Poppy Tincture. Use Displace to reach the chandelier in the middle of the Lobby's hall, then an opened window on the second floor. From there, climb down the railing on the left to reach the door control system and open either the service door or the main doors to the Inner Atrium. Enter the unlocked passage and reach the corridor with two Arc Pylons. Use Displace to climb on the lamps above the corridor, hide from the Arc Pylons and reach the hall of the Main Atrium.

In the Inner Atrium, use Displace to climb on the balcony overlooking the entrance, without the Clockwork Sentinel noticing. Walk to the right to a locked door. Use Foresight and pass through the Wall of Light guarding the stairs. Navigate to the second floor and place a Displace marker behind the windows near the locked door. Displace to the marker to pass the door and climb up the third floor.

Enter Dolores Michaels' office on the third floor. Open her secret vault by pushing the button behind her desk, then steal her Vault Key. Enter the stairs' elevator shaft through the service access and climb to the top floor. Explore the floor by using Displace and a vent to hide from the Arc Pylon up there. Reach the drawers on the other side of the Arc Pylon room and search them to acquire the Vault Brake Lever.

Use Foresight and place a marker inside the opened service hatch atop the Elevator Vault, then displace to it. Climb down the chain to the Elevator Vault, use the key to unlock each of the brake coupling panels, then use the lever to set the Elevator Vault free. Once the vault has crashed down, open it and steal the Twin-bladed Knife. Escape through a sewer passage, then by the door to the sewer outside the bank. The achievement unlocks once Billie is outside the bank. Идеальное преступление