[8.4]. Mission 4 - Area 51: Escape

Immediately grab the alien with B, then run forward and out the door. Keep running down the hall and through the door at the end. Go right, kill the two guards, and go through the giant brown door at the end. While still carrying the alien, go right and through the steel door at the end. Leave the alien here. Turn around and go back to where you killed those two guards. Use the door on the right, kill the guard inside, run around the center of the room to the back, and go down the hallway at the end. Use the door here.

Kill every single guard in this area, take their ammo and Superdragons. Go to the left side of the room and through the steel door on the left. Turn left and follow the brown catwalk until you reach another steel door. Kill any guards that get in your way. Enter the room, face right, and you will find the CI spy. Objective number one is complete.

Head back to the brown catwalk, ensuring the CI spy remains with you. Open the door at the end and use the grenade launcher function of your Superdragon to quickly eliminate enemies. The CI spy will then set explosives on a wall to create an entry to the hangar. Protect him at all costs. Once the wall is blown up, go through the hole to complete your second objective.

Kill the guard straight ahead, then turn left and go down the ramp to see the Hover Bike. Go through the brown door under the ramp. After the cut scene (a non-interactive sequence), exit the room and run past the ramp, protecting Elvis as you go. Run to the spaceship. After the conversation, you have two options:

Follow Jonathan and stay behind him until he stops. Then, go in front of him and cover (press the cover button to crouch behind walls or objects) him as he opens the hangars to complete the final objective.

Follow Jonathan and run in front of him *before* he stops. You must then open the hangar. Run up the catwalk, follow the two paths, and activate both control panels. Head back down the ramp and get on the Hover Bike. Ride through the door beneath the ramp, go right, down the hall, right again, and follow the long hallway until it stops. Go right down the ramp until you reach the end. Kill the guard at the end, go through the door in front of you. In this room, veer left and go through the door at the upper-left side. Follow the hallway until it turns right, then go right. In the next room, turn left and go through the door on the left. Now go through the door on the left and ride outside to escape from Area 51 and end Mission 4.