[8.4]. Mission 4 - Area 51: Infiltration

Immediately strafe left for cover (press the cover button to crouch behind walls or objects) behind a pillar. Wait for guards to pass, then eliminate them. Collect MagSecs, ammo, and grenades, but beware of the automatic machine gun. Head away from the helipad and down the path. Destroy the next automatic gun with your MagSec. Continue past it and around the corner.

Proceed slowly around the corner to avoid a machine gun on your left. Shoot it and move forward. Turn right towards the large tower and use your Falcon or MagSec to kill the two guards. Run past the tower and eliminate any guards coming from the tunnel. If you have grenades, toss one through the hole in the fence to the left of the tunnel onto the snow to detonate mines and access the Rocket Launcher on the helipad. Take the Rocket Launcher, then ascend the tower. Press the red button at the top to open the gate, then descend and enter the tunnel.

At the tunnel's end, deal with the guards and the machine gun to your left. Return to the helipad where you found the Rocket Launcher. Stand on the helipad and toss a grenade towards the cliff to detonate any remaining mines. Veer left from the helipad and locate a small opening in the steel wall. Crouch and enter it.

Towards the end of the small tunnel, find and take some armor. Exit the tunnel, kill the guard outside, and follow the path to its end. Turn right and destroy the two machine guns on the wall. Turn around and pass the hole in the wall on your right, then turn left. Proceed along the side of the wall and turn left again at the end to eliminate the machine gun on the wall above you. Turn around, descend the ladder, and enter the hole in the ground.

Enter the silver door ahead, veer right, and make your way to the back of the room. Plant your Explosives on the Computer Panel at the rear. Quickly exit the room and climb the ladder again. Your first objective is now complete.

At the top, move forward and shoot the guard in the center of the large open area. Take the key card he drops. To the right of where the guard stood, next to the large roll-up gates, is a key-reader on the left. Press B to activate it and open the gates. Enter the gates and proceed up the elevator on the left.

Exit the elevator and eliminate the guards using your Dragon. Be cautious of guards with grenades. Once you have successfully exited the elevator, your second objective is complete.

Run to the ramp at the back of the room and ascend it. Follow the path at the top and use the elevator at the end. Exit the elevator and continue along the path until you reach another ramp. Eliminate any guards you encounter. Run underneath the ramp and through the open door to meet with the CI spy, finishing the first part of Mission 4.