Part 132

Start by heading east around the south side of the tables to reach the door to the Changing Area. Carefully open the door, go through, and immediately turn right to the lockers to avoid an Enforcer. Quickly grab Hazmat Suits and change into one. Proceed to the door of the Virus Chamber and wait for someone to exit. Subdue them and hide them in the nearby Closet. Return to the door, stay to the left, open it, and toss a Coin in the middle of the walkway to lure the female Lab person. Subdue her when she reaches the Coin and hide her in the Closet. Leave the Coin, return to the corner, and wait for another person to exit the Chamber. A third Lab person will enter the Changing Area and see the Coin. Subdue them, take their Disguise, and hide them. Enter the Laboratory; two Lab people should remain. As you enter, one will leave for the Break/Security Room. Go to the Laptop and hack it. Afterward, go to the roof, use the Generator to lure and kill Indro, switch into his Disguise, and leave the mission via the Seaplane.

Follow the steps for Level Two up to killing Indro. Turn the Generator back on before dragging Indro to the Container. Bertoldo will be patrolling between Indro's original position and the Break/Security Room. When he is on the west side and heading back towards Indro's original position, he will pass under the Stalactite above the south door to the Laboratory. After changing Disguises, shoot the Stalactite when Bertoldo is underneath it to eliminate him. Then, leave the mission via the Seaplane.

Complete the Laptop hack as before and exit through the west door. Go to the north door of the Break/Security Room, grab the Wrench, crouch by the door, and shoot out the Recorder through the window. Use the nearby Pipe to climb to the Guard Area, subdue the Guard, hide them, and take their Disguise. Proceed to the Observatory building, enter the Lab, and take the Amputation Knife. Exit through the east door, pass through the Kitchen building, and enter the Pantry. Exit through the window to your Safe House to acquire the Explosive Golf Ball. Retrace your steps to the Guard Area to re-acquire the Lab Technician Disguise, then go to the Generator. Wait for Bertoldo to approach Indro and a female Civilian below. Turn off the Generator to lure Bertoldo. Crouch behind the second air conditioner unit northwest of the Generator. When Bertoldo stops at the Generator, use the Amputation Knife to kill him. Leave the Generator off. Dump Bertoldo in the Container, take his weapon, and place it at the end of the air conditioning unit near the Generator. Return to the second air conditioner unit and use the Wrench to stun Indro when he approaches the Generator. Turn the Generator back on and drag Indro's body to the east end of the air conditioning unit near the Container. Go between the two air conditioning units, equip the Golf Ball, and aim to just barely go over the unit before throwing it towards Indro's position. The Ball should hit the blue barrels near him, killing him.