Main Wing

From the surface, enter the bunker and follow the coned path to another bunker.

Inside, press the airlock button and use your Interface Module to scan the security monitor.

Enter the elevator and press the up arrow to reach the botany lab.

Use your security access to enter the Main Wing door.

Enter the room with the sprouting body and head right to the Laboratory 01 door. Use your Interface Module to unlock it.

Listen to the voice recording, read the terminal, and crawl through the vent behind it (CTRL).

In the vent, follow the path to a water cistern area. Save at the Wireless Access Point.

Crawl under the gap in the door to the right of the Access Point.

Note the name and number on the keycard on the table in the center of the room (e.g., Maria's keycard, code 9785).

Go to the terminal marked Maria's and enter the code. Press the EXE option.

Follow the cables through the now-open door.

Go past the Lab 02 room and into the dark hallway. Find and crawl into the vent at the end.

Follow the vent to the chemical lab. Save at the access point above the hatch.

Mix chemicals via the terminal using the following: Base: Isopropyl Alcohol, Active 01: Copper Ions, Active 02: Hydrogen Peroxide, Stabilizer: EDTA. Press TEST.

Backtrack to the lobby area where you first entered and enter the decontamination chamber.

Go inside and pick up the keycard on the floor beside the body (e.g., William's keycard, code 4619).

Return to the area where the Access Override terminal was (where Maria's keycard was found).

Enter William's code (e.g., 4619) into the terminal. The gate to your right will open.

Climb down the ladder, follow the hallway, and climb down a second ladder.

Follow the red pipes and objects on the ceiling to navigate the dark tunnels: out the doorway, right along skinny red pipes, left and straight up a slope, through a doorway following red hanging crates, right to a larger red pipe, and left to the crank wheel.

Turn the crank wheel.

Make your way back through the tunnels to the ladder, looking for red objects on the ceiling.

Climb up the ladder, run to the cafeteria area, and crawl under the door to reach the cistern. Save here.

Climb down the ladder. Follow the tunnel and climb up another ladder.

Crawl through the vent door to the office. Save at the access point.

Enter William's code (e.g., 4619) into the terminal.

On the SECURITY tab, upgrade your Interface Module by scanning the screen.

Make your way back to the Ward: go to the lobby, get in the elevator, go up, and use the airlock to head back to the Moon's surface.

Get back to the other bunker, use the airlock to re-enter the building. This transitions to Chapter 6.