[8.4.]. Mission 4 - Area 51: Rescue (2)

From the start, move forward and turn right around the corner. Head up the ramp and eliminate any patrolling guards. Exit the ramp area, turn right, and go through the opening in the crates. Continue to the end, turn right again, and kill the guard. Turn to face the explosive barrel under the crates to your left. Crouch and retrieve the Double Falcon 2 where the barrel was. Return to the ramp area and use the nearby elevator to ascend to the next floor. Eliminate any guards at the top, exit the elevator, and head right.

Eliminate the distant guard. Turn back towards the elevator and follow the catwalk to the right until you reach a large steel door. Proceed through it and eliminate any guards on the catwalk above. Be aware of guards using the elevator to ambush you. Clear all guards in this area. Return to the beginning of the level where the crate was initially located.

Use the Action button to push the crate. Take it back up via the elevators to the top of the catwalk. Follow the black catwalk until you see a small 'X' carved into the steel wall on your right. Position the crate in front of this wall and shoot it to cause an explosion, creating a hole. Enter the hole and navigate through the tunnels. On the other side, head right down the hall. Take another right at the end of the hall and proceed until you reach the showering room on the right. Enter and find the Lab Disguise. Put away your weapons.

Head left and proceed down the hallway to the end. Go through the door on your right. Kill the guard and the scientist within. Inside the circular room, go left and press the Red Button. Turn around and equip your X-Ray Scanner. Aim it at the container until the objective is completed. Return to the hole in the wall you entered this area through.

Go left and through the first door, eliminating the guard. Take his Super-Dragon. Proceed through the door to the right of where the guard was. Run past the guard and through the next door. A guard will speak to you and allow passage. Approach the scientist in the rear right of the room to become uncovered. Eliminate any guards and scientists present. Proceed through the next door to complete this objective.

Exit the room and go right into another door a short distance away on your right. Eliminate any guards present and take the key card. Continue through the next door. In this room, kill the guards and take the key card dropped by one of them. Proceed through the next door near the glass. Go around the corner and through the subsequent door to complete your final objective.