[8.6]. Mission 6 - Pelagic II: Exploration

Disable primary power source: After the cut-scene, you'll take control of Joanna. Elvis will leave, so turn right and head for the door next to the ramp. Peek inside to see the guard, then quickly open the door and take him down with a head-shot. Go through the door and turn right. At the end of the hallway, turn left and immediately take out the guard before he can raise the alarm. Now, run to the next door and eliminate the guard waiting on the other side through the glass. Enter the room and deal with any remaining guards. Head down the hallway towards the back of the room, but take the door on your left just as the hallway begins. Inside, go around the wall in front of you and take down the guard who enters. Immediately after, destroy the security camera behind that same wall. Now, shoot any guards positioned below you under the grates. Equip your X-Ray Scanner and target the power generator in the center of the room. Interact with it to shut off all the green switches, disabling the power. Now, carefully head down the stairs, keeping an eye out for another camera. If you're facing the stairs, the camera will be behind them. Shoot it out. Approach the large power generator near the stairs and find the green button on it. Pressing this button will shut down the main power source, completing your first objective.

Deactivate GPS and autopilot: Leave the room through the door you entered and turn left. Go up the stairs and eliminate the guards at the top. Turn right and proceed up the next flight of stairs. You'll encounter some scientists here. Joanna will instruct them to shut down the systems, which they will. Be ready, as one of them will pull out a gun; quickly take him down. Once this is done, your second objective will be complete.

Rendezvous and escape with Elvis: After completing the second objective, return down the stairs to the bottom and go through the door on your left. Once inside, turn right and eliminate any guards in your path. Navigate through several doors and deal with numerous guards until you reach a door where you'll meet up with Elvis. Simply follow him and protect him to successfully complete your final objective.