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

Disable internal security hub: From the rooftop, head down the ramps to the lower level. Eliminate the patrolling guard and take his CMP150. Proceed through the door with steel grates, then the next door. Descend the ramp slowly to avoid detection by the guard below. After neutralizing him, continue down the ramps to the bottom. Turn right and locate the redish control panel; use your ECM Mines on it to complete the first objective.

Obtain keycode necklace: Go through the door with steel grates on the far wall. Descend the ramps and eliminate the guard halfway down with your Silenced Falcon. Proceed through the door, turn right, and take out the guard ahead with a headshot (a shot that lands on the enemy's head, usually an instant kill). Deal with the second guard who arrives. Press the button on the desk where the guard was. Enter the large doors near the glass elevator. Put away your weapons, and after Cassandra speaks, punch her to take the keycode necklace. Exit the room, go through the brownish door near the elevator, and ascend the stairs. Exit the elevator, turn right, and destroy the camera. Take the elevator on the left down, eliminate any guards, and descend the small flight of stairs. Enter the door on the right, place an ECM mine on the control panel, and exit the room.

Gain entrance to the Laboratory: Locate the elevator that leads into the laboratory. This elevator is behind a hidden door. After finding it, turn right at the bottom of the steps and enter a small room with a computer and desk. Press B to reveal a hidden door behind a multi-colored wall. Eliminate all enemies in this area. Navigate the area until you find a blue-ish elevator. Take this elevator to complete the mission.