a soda and drinks it as the truck carries her off to Area 51.

Step out of the truck and take the Small Medi-pack from the crates to the left.

Move forward and an MP (military police officer) will spot you. Gun him down before he reaches the alarm panel. If he does, you won't be able to get the MP5 (a submachine gun), in which case you should restart the level.

In the room with the rifle sign outside, you can get the MP5 along with some ammo for it.

Do NOT throw the switch.

Go back out and push the button to raise the grating nearby.

Go through and take the Large Medi-pack from the right before pulling up into the crawlspace.

Stay low as you go into the laser trap. Wait for the lasers to go right and then quickly crawl to the space to the left for another Large Medi-pack.

Crawl back to the middle section and then wait for the lasers to go left. When they do, stand up and run for the ladder.

Climb up into the crawlspace and you will see an MP walk by. Crawl out and shoot him. If he manages to activate the alarm, a set of laser traps will be activated but you won't lose anything.

Before going further, throw the switch nearby to open the door and let out an inmate. He will be able to help you later.

Inside his cell is Small Medi-pack (it's behind the door on the left).

Crawl under the first laser trap (if it's there) and then go through the space on the right.

Take the Flares and climb up into the next room. The green lasers will activate the turret, so avoid them and move on.

In the next hallway, crouch down and crawl up to the box on the right to stay out of the MP's sight.

Draw your Desert Eagle and then stand up and quickly fire two shots to drop him.

If he makes it to the alarm pad, it will seal off the nearby storage room containing Grenades, Harpoons, and Rocket.

Run to the end of the hall and save your game as this next part is little tricky.

Throw the switch and the trap door will dump you into the outside area.

Turn right and kill the Sniper before he can hit the alarm. If he does, secret 1 will be sealed off and two Dobermans will arrive on the scene.

When all's quiet, crawl under the space to the left of the alarm and take the Grenades (this will be the Grenade Launcher if you didn't get it before).

After going through it, turn right and run to the corner for some Shotgun Shells.

Now drop into the pit and throw the switch.

Run around the grating until a trap door opens beneath your feet.

Drop down and kill the MP.

Crawl through the space with the raised grating and take the Save Crystal. If the Sniper managed to raise the alarm up above, this the secret will be inaccessible.

Crawl through the dark space and take the Desert Eagle Clips from the right.

Move into the small room and pick up the MP5 Clips from the right before stepping on the trap door.

As soon as you land, kill the MP, take his Small Medi-pack, and then follow the hallway he was walking down.

At the end, throw the switch to let out an inmate, who will go and kill the MP that shows up.

You can also go through the tunnel in his cell for a Large Medi-pack.

Head back the opposite way over the glass floor.

Find the crawlspace on the left and go through (the area ahead is a death trap).

Pick up the Large Medi-pack and the Shotgun.

Crawl out of the space and turn left.

Round the corner and you can see a Sniper at the end of the hall. If you wait, your friend will run down and take care of him.

Enter the area to the right and the doors on the left and right will open, letting two Snipers out. If you waited for the inmate, he can kill both of them.

Just sprint back to the crawlspace you were in before, and he will take care of the rest.

One of the Snipers drops a Small Medi-pack.

In the left room there is a switch. Throw it and a grate opens in the right room (if one of the Snipers raised the alarm, a laser trap will block you. Throw the switch at the end of the hall to shut it off).

Crawl through the grate and touch the green lasers.

Kill the MP that comes down the ramp and then go up.

Take a right at the intersection to the missile silo.

Kill the Sniper on the distant platform and then drop down to the floor.

Climb up on the Sniper's ledge and take his Code Clearance Disk.

Return to the intersection and take the other path.

In this room, drop down to the floor and carefully move about to avoid the green laser trap.

To the left of the conveyor belt, you can run down into the dark area and take a Small Medi-pack.

In the opposite corner of the room, jump over the laser and use the Code Clearance Disk on the computer.

Climb up the ledge behind you with the swinging hook.

To the right of the hook, jump up and shoot out the discolored grating.

Follow the path down the ladder to a Save Crystal.

Time your run past the swinging hook and take the Shotgun Shells.

Drop onto the conveyor belt and use a running jump with a grab to reach the ladder ahead.

Climb up to the rafters and kill the Sniper.

Jump across the gaps to his body and take his Hangar Access Key.

Now return to the ground floor and go back to the missile silo.

Drop down to the floor and go through the hallway.

Ignore the hole and run to the end.

Open the door with the Hangar Access Key and then kill the MP inside.

Drop down onto the ground next to the monorail. It's electrified, so stay off of it.

Turn left and run down to the end of the tunnel.

Climb the ladder and push the button to call a train.

Run back down to the train and crawl under the rail to the ladder.

Climb up into the alcove and take the Shotgun Shells and then use a standing jump to the top of the train.

Climb up into the opening and cross the first grating.

For the second, monkey swing across the grating and get as close to the laser as possible. As it moves away, quickly swing f