[8.1]. Mission 1 - dataDyne Central: Extraction (2)

Equip Night Vision Goggles (NVGs). Kill the guard behind the desk with a headshot (a shot that lands on the enemy's head, usually an instant kill). Find and open a hidden door to the right of the desk, kill the guard inside, and grab ammo. Kill the next two guards, then clear the main room of guards until you reach stairs. Kill the guards at the top of the stairs, go up, turn left, and enter the elevator to access the Foyer Elevator.

As you ascend in the elevator, remove the NVGs. Exit the elevator, go right, turn right around the corner, and kill the guard. Go through the doors behind him, follow the hallway, and kill the two bodyguards. Take their shotguns and cartridges. Go through the single door at the end of the hallway and kill another bodyguard.

Backtrack to the first elevator (not the one you just used) and go up one floor. Exit the elevator, go right, and kill the helmeted guards around the corner. Go through the door to their left. Navigate the inner office, go left, and through the hidden sliding door. Go through the next unlocked door and kill the bodyguard. Head through the next door. Go straight and clear the room ahead of bodyguards. Return to the elevator you saw earlier and use the door next to it.

Go up the stairs to the next floor. Go right and kill the guard arguing with scientists; let the scientists run away. Take the Rocket Launcher.

Turn to face the large window on your left. Equip the Rocket Launcher and wait for the Hovercopter outside. Shoot it with the Rocket Launcher to destroy it.

Turn right and use the door near where you obtained the Rocket Launcher. Take the stairs to the top floor and go through the steel grate. Kill the remaining bodyguards outside to complete the objective.

Take the ramps all the way back to the helipad to complete the mission.