Part 26

In the elevator area, wait for the patrolling terrorist to be at the far end of the hall before taking down the stationary terrorist in the dark.

Track the patrolling terrorist as he returns and take him down. Sticky shockers are recommended for an instant KO.

Hide both bodies in the closet and shoot out the closet light.

Enter the automatic doors through the one on the left.

Turn off the lights at the switch to the left of the doors.

When the technician comes to turn the lights back on, grab him and interrogate him.

Move the technician to the far side of the room near the long plate glass window overlooking the sub berth.

Interact with the computer on the control panels to raise the sub while Sam holds the technician at gunpoint.

After the sub rises, wait for the irate thug from the sub to radio demanding to know why it was raised early and threatening to sound an alarm.

If the technician is still awake, use the 'Interrogate' option that pops up to have him lie about a bad ballast tank to allay the sub's concerns.

Once the sub terrorist signs off, it is safe to knock out the technician.

Hide the unconscious technician's body.

Exit the control room, turn right, go all the way down the hall, turn right again, and open the single door to end this part of the level.

Save at the checkpoint (an auto-save point you restart from on death).

Go up the stairs and crouch at the top.

Turn on your thermal vision (HUD (heads-up display — the on-screen icons showing health, ammo and the minimap)) and look at the window inside the door across the room.

Shoot out the lightbulb over the door.

As you approach the door, the guard will turn right and patrol down the walkway.

Wait for him to get far enough down, open the door, move to the left edge of the catwalk, turn back around, and equip the SC-20K.

Shoot the guard in the head, or use another projectile like an Air Ring Foil.

Hide his body in the room you just left.

Move slowly down the catwalk; the ceiling lights are armored and cannot be shot out.

There is one guard with a helmet-flashlight on the balconies across from you, and two further down on your side on different levels.

Shoot out the lightbulb on the ceiling of the lift ahead to darken the area.

Move up and hit the switch to start the lift, but do not get inside it.

As the terrorists follow the lift with their flashlights, sneak to the edge of the ledge where the lift was and jump down to grab the line it is suspended from.

Hit the 'B' button to grab the zip line.

After sliding down, Sam will come to some big wheels and need to drop again; hit the 'B' button again.

After dropping from the second zip line, Sam will hang on the edge of the ledge.

Wait until you spot the patrolling guard and use your thermal vision if needed.

When the guard is facing away, pull Sam up.

Hide his body.

Make your way down the catwalk to the sub and carefully move Sam to the open hatch and let him climb down the ladder. Do not jump, as it costs health.

Lethal force is no longer allowed inside the sub.

Go down the second ladder.

Use an Air Ring Foil to knock out the terrorist who comes around the corner from the left.

Hide his body next to the ladder.

Continue forward slowly to a sliding door leading to the crew's quarters.

Use an Air Ring Foil on the terrorist sleeping in the lower bunk at the far end on the left.

Go down the next ladder just ahead.

Use a Sticky Camera on the wall to your right, where the doorway to...