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|                              1.20)  SUBMARINE                               |
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 - Mission requirement:  (Avoid being spotted and don't kill the captain.)

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Submarine 1
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Head through the door on the right, then drop down the ladder in the next room.
Open the door on the right here, and wait for the guard directly above the
walkway to start walking away from you.  When he's half-way to the other side,
quickly run to the middle of the walkway where the large cylinder will block
the second guard's view of you.  Wait there until the first guard turns around
again, then run to the left corner by the next door.  Open it and head through
once the first guard starts to walk away again.

Open the next door and wait for the Captain to enter.  There's a grunt working
on an electric box down there.  Sneak up on him after the Captain leaves, grab
him from behind, and knock him out.  Avoid the guard on the floor above you
while making your way around the room to the door on other half of the U-shaped
area.

Open the door in the next small room, and you'll find yourself in another
catwalk area.  Wait for the guard on the left to start walking away from you,
then run to the middle of the room.  Wait for that guard to turn around and
head back, then run forward through the next door.

Take the ladder up and open the door.  Wait for the guard on the right to start
walking away from you, then creep up behind the guard in front of you.  Grab
him and drag him back to the small area you were just in before the other guard
comes back.  Knock this guard out, and wait for the second guard to walk away
again.  Run to the middle of the room and use the cylinder as cover, then head
for the door when the guard turns around again.

Head through the left door in the next square room.  There's a guard at the end
of the catwalk in the next area.  No one else is around, and he's kinda hard to
sneak up on... so instead, wait around the corner for him, then tag him in the
head with handgun shots until he's dead.  Enter the door on the left to start
a cutscene.

Head down the stairs in the cutscene, then take a left and follow the hallway.
When the scene is over, head for the red button by the radio.  Press it to
complete a mission objective and reach a checkpoint.

 - Mission objective (Find the radio and contact Jones) is now complete.

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Submarine 2
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Open the door on the right, then wait for the guard in the next area to start
walking away from you.  Approach him slowly so you don't alert him, then grab
him and knock him out.  Head for the officer's cabin at the end of the area.
Enter it, then close the door.  When you look at the door, there's a black
cover thing over a small closet on the right.  Open that up, then get inside.

 - Mission objective (Hide in the officer's cabin) is now complete.

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Submarine 3
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Open the black thing to exit the closet, then grab one of the items off of the
table.  Face the door, and when it opens, smash the guard with your item.
Run out into the hallway and get a handgrenade ready.  Chuck it into the room
at the end of the hall, then get your assault rifle out.  Deal with any guards
that survived the grenade, then grab the armor, healmet, med kit, and ammo from
the area to the right of the door.  There's also a shelf full of assault rifles
on the left side of the door if you need ammunition.

Head out to the next room and go to the left side to grab the med kit off of
the shelf.  A few more guys are going to try to enter the room from the next
door, so eliminate them.  Enter the next room and grab the med kit and assault
rifle ammo from the wall, then go out to the left side of the catwalk in the
next area.

Run at the door, and a guard will open it.  Kill him, then immediately turn
around to deal with another guard coming out of the door you just came through.
Once he's dealt with, turn around again and approach that door for a second
time.  Two more guards will come in from the next room, and another two will
come in from the room on the right.  Make sure you eliminate them all carefully
before you enter the area.  Grab the med kit from the shelf on the left, then
collect as much equipment from the downed guards as you can.  Exit out the left
side of this room.

Enter the small room in front of you, but don't drop down the ladder yet.
Instead, toss a grenade into the upper right corner down there.  It should kill
the guard, but be prepared to fire as you jump down, just in case.  Once you're
down that ladder, head down the next one as well to reach another checkpoint.

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Submarine 4
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Grab the med kit from the wall, then open either door.  Kill the guard, then
turn around and deal with the guard from the opposite side.  Head through next
area and open one of those doors.  Eliminate the guard, then turn around to go
through the other side.  There will be another guard, so get rid of him, then
kill the two assault rifle guards that will attack from opposite directions.

Head to the end of the hall and enter the next small square room.  Grab the
med kit from the wall, then open the door on the right to advance.  Slaughter
the two guards in here, grab the full med kit from the high shelf and the armor
from the shelf in the shadows, then open the door on the left.  Launch an
assault rifle grenade at the back-right corner of the room to kill the two
guards behind the tables, then enter the room and turn right to kill the third
guard crouching near the door.  Grab their stuff, then exit through the door
behind the upturned tables.

Unless you've been wasting your assault rifle grenades on stupid targets, you
should have four or five of them.  Two close grenades are enough to take
Edelbright down, but don't hesitate to blast him with the bullets while you're
launching grenades.  When he's dead, raid him for all of his items, as well as
the other guards that were in the room.  Use your new Key to head up through
the hatch in the middle of the room.

Take either of the next ladders up, grab the Important Document from the shelf,
then head back down the ladder.  Enter the door on the left, then open the next
door too.  There are four guards in the bridge area, so deal with them all and
collect their equipment.  The Captain's room is in the back-right of this area,
so enter it and grab all of the items from his desk.

 - Mission objective (Find the torpedo lock key) is now complete.

Backtrack to the room with three ladders and head down.  A white box will show
up on your screen to highlight the location of the torpedo tube you need to
open with your new key, so head over there and unlock it.  Be prepared to turn
to the right after you do that, since two guards will come through the door.
Kill them both, grab their equipment, and head through the torpedo tube.

 - Mission objective (You've been spotted!  Escape through the torpedo airlock)
is now complete.