[8.6]. Mission 6 - Pelagic II: Exploration (3)

Disable primary power source: After the (cut-scene) (a cinematic event that cannot be interacted with), turn right and go to the door next to the ramp. Open the door and take down the guard inside with a (headshot (a shot that lands on the enemy's head, usually an instant kill)) (a shot to the enemy's head, usually resulting in instant death) quickly. Go through the door and turn right. At the end of the hallway, turn left and immediately kill the guard before he sets off the alarm. Run to the next door and kill the guard on the other side through the glass. Go inside and deal with any remaining guards. Go down the hallway towards the back of the room, then turn left through the door just as the hallway begins. Go around the wall in front of you and kill the guard that enters. Blow up the security camera located behind the wall. Shoot any guards below you under the grates. Equip your (X Ray Scanner) (a tool that allows you to see through walls) and locate the power generator in the middle of the room. Turn off all green switches to shut down the power. Head down the stairs, being careful of a camera behind them. Shoot out the camera. Turn to the large power generator near the stairs and press the green button to shut down the main power source.

Secure laboratories and research data: Leave the room, go left, and down the hall. Turn left at the first set of stairs and enter the very first door on your left. Blow up the security camera on the right. Go down the hall and enter the very first door on your left. Put away your weapons before entering. Punch the scientists in the room until they are unconscious before they can escape. Collect the disks they drop. Enter the door across from this room. Knock out the next scientist, take his disk, and this objective will be complete. Return to the room where you shut down the primary power source.

Deactivate GPS and autopilot: Leave through the door you entered, and turn left. Go up the stairs and kill the guards at the top. Turn right and go up the next flight of stairs. You will find scientists; tell them to shut it down. One scientist will pull out a gun, so kill him.

Activate Moon Pool lift: Go down the stairs and enter the door on your left. Go right and kill the guards. Follow the long hallways until you reach a room with water. Go left and activate the control panel to unlock the large door nearby. Enter the newly unlocked door and go down the ramp. Activate the control panel at the foot of the ramp.

Rendezvous and escape with Elvis: Go back to the green stairs. Turn around and go back through the door on the left. Go right through the door. Navigate through multiple doors and guards until you reach a door where you will meet Elvis. Follow him and protect him to complete the final objective. You should hear Elvis early on, indicating you are on the correct path.