Part 78

Doctor in the House: Complete the Eureka, In the Right Space, and The Shock Doctrine challenges.

Unseen (alternate): Near the Bridge Controls, turn the large Valve to fill the Silo with smoke. Wait for Dr. Ashford to approach, turn the Valve, quickly go up, Garrote him, and dump him over the outer Railing to avoid detection.

Research and Hidings: Subdue seven Researchers, hide them in Closets, and complete the section without being Spotted. There are four Closets: Conference Room, Test Chamber (x2), and Chemical Lab (lower level).

After obtaining the Guard Disguise and dragging the body to the turn halfway up the stairs, go to the Conference Room and use the Radio on the counter to attract a Researcher. Wait for him to turn off the Radio before Subduing to avoid attracting a Guard.

Subdue the first Researcher and then the second. Put both bodies in the Conference Room Closet.

Grab the Radio and drop it between the two large counters in the Special Weapons room. Attract a nearby Researcher by turning on the Radio. Subdue him when he turns it off and drag him to where you dropped off the Guard.

Drag the subdued Researcher to where you dropped off the first Guard.

Go back down into the Special Weapons room. Pick up the Radio and drop it near the base of the counter parallel to the door. Turn on the Radio to attract one of the two Guards near the Special Weapons room.

Get behind the Guard when he walks past, wait for him to turn off the Radio, then Garrote him. Drag him to the platform partway up the back stairway.

Pick up the Radio and drop it near the base of the counter parallel to the door. Turn on the Radio and stand near where the second Researcher was. Get behind the Guard and wait for the door to close before killing him.

Drag the Guard to the base of the stairs, switch into his Disguise, and drag him to the other Guard.

Go into the main walkway and into the lower level of the Chemical Lab to get the Fire Paste. Go up and spike the Hair Tonic.

Go back down into the Special Weapons room. Pick up the Radio, switch back into the Researcher Disguise, go back into the Conference Room, and drop the Radio on the ground between the door and the counters.

Go back to Special Weapons, pick up a couple of Dummy Arms, and drop them in the Conference Room.

Wait for Dr. Valentine to die from the spiked Hair Tonic.

If the Guard continues his route, it should end at the base of the stairs near the Conference Room. Turn on the Radio to attract him, then walk to the other end of the room. Garrote him when he gets to the Radio, drag him partway from the Radio, switch into his Disguise, and drag him into the back stairway. Grab a Dummy Arm and go back to the main walkway.

In the Test Chamber, throw a Dummy Arm at the wall beneath the window to attract one of the Researchers. When he gets to the Dummy Arm, turn on the Radio to get him into the Conference Room. Subdue him when he gets into the Radio.