Orange Box Walkthrough

This is the Portal FAQ v1.0
By Mark Green
Email address for submissions/comments:
mark [at] antelope [dot] nildram [dot] co [dot] uk
The latest version of this FAQ will always be available from
http://www.gamefaqs.com.
-----------
wwwwwwwwwww   If the block of characters on the left has a straight
mmmmmmmmmmm   right-hand edge, you are using a monospaced font.
iiiiiiiiiii   This FAQ looks far better viewed in a monospaced font.
OoOoOoOoOoO   Use Notepad, MORE, or the IE or Firefox text viewer
12345678901   to view this file.
-----------
Neither the author of this FAQ, nor any person who distributes it in
any way, shall be responsible or liable for anything that results from
using this FAQ for any purpose, including but not limited to damage to
your PC, hands, eyes, or sanity.
This FAQ may be freely distributed provided that it is kept unmodified
and in its entirity.  If the FAQ is distributed in a form where it can
be updated, for example as part of a website, then it must be kept
up-to-date with the latest version.  This FAQ may not be sold, or
included as part of a publication that is sold (including a website to
which a subscription is charged), without the author's express
permission, which can be requested only by e-mail to the address
above.
Portal is (c) Valve Software.  The use of any trademarks within
this FAQ is not intended to represent a challenge to their validity.
0123456789012345678901234567890123456789012345678901234567890123456789
INTRODUCTION ---------------------------------------------------------
Portal is a Half-Life 2 engine game designed as a showcase for an
innovative game mechanic: the portal gun.  Portal is available at
retail as part of the "Orange Box" compilation, or it can also be
bought on its own from Steam for US$19.99.
Portal is actually an updated version of an older game called
"Narbacular Drop", which is available for free.  Narbacular Drop has
far fewer levels, and much worse graphics, and some exploits that
work in Narbacular Drop don't work in portal.
======================================================================
GAME MECHANICS =======================================================
======================================================================
PORTALS.  If you don't get these, you're going to be in trouble.
There are two, the blue portal and the yellow portal.  Go through the
blue portal and you come out of the yellow portal, and vice versa.
If only one of the portals is active, it'll be all cloudy indicating
that it can't be used because it has no other end.  The two portals
exist in exactly the same map - there's no "multi-dimensional" thing
going on.  There are all kinds of funky things to learn about portals,
but you'll learn most of them by playing the game, so I won't explain
them here.
METAL.  Walls and floors can be made out of it.  If they are, you
can't put portals on them.  Bummer.
BUTTONS.  All buttons are red.  Some buttons are small, and you can
press them yourself with the USE key, whereupon they'll activate
something.  Usually, the button will reset after a while and the
thing it activated will shut down.  Other button are large, and you
can activate them by standing on them, but usually this will be no
use because you will need to be somewhere else to interact with the
thing the button's connected to.  The solution is to pick up a..
CUBE.  Handy little things which you drop on big buttons to hold them
down.  You can use them for other purposes too.  Cubes can be
destroyed.  If a cube is destroyed, you'll usually be given another
one at the point where you collected the cube from originally.
EMITTERS, PELLETS, RECIEVERS.  Emitters occasionally shoot energy
pellets.  If an energy pellet hits a reciever, it activates something
(permanently).  If an energy pellet hits you, you die.  If an energy
pellet hits anything else (such as a wall, or a cube) it bounces off,
and will continue bouncing for a finite time before it explodes.  The
emitters are very waste-conscious; they will not shoot another energy
pellet while one is already in the air (but if there are two emitters,
each one can have a pellet in the air) and they will stop shooting
altogether when all tasks requiring energy on a map have been
completed.
KILLER FLOOR.  Also known as goo.  It's on the floor.  It kills you.
Any questions?
TURRETS.  Ok, I'll be a bit less facetious about these guys, since
they're quite interesting.  Essentially, they sit there looking in
one direction (you can see their red scan beam emitted in that
direction, but their field of vision is actually about a 45 degree
cone with the beam in the centre). If they see you, they activate
and start shooting you with their machine guns.  Glass, walls, or
cubes will block the guns (glass will be cracked, but won't break).
They continue firing until you're dead or you move out of the way.
Damage in Portal is a bit odd - essentially, if you get shot too much
you're dead, but there is no LASTING damage.  You can get shot a
little bit by every turret on a map and you'll live, but if one of
them shoots you too much, you'll die.  Assuming you move out of the
way, they'll search for you for a moment, then shut back down again.
And they have cool sing-song computer voices and they're
magnificiently creepy.  How do you defeat them?  It's actually easy.
You just push them over (!) from the side.  You can also drop them
into portals if you like - anything that makes them fall over.  The
only kicker is that when they are shooting you, their shots knock you
back, so you can't simply approach them and tip them from the front.
But since you have portals, approaching them from another direction
can't be too difficult, can it?  By the way, turrets are smart and
recognise other turrets, so they won't start shooting when they see
one.  But you CAN make them shoot at another turret by dodging out
of the way carefully, and you CAN make them fall on each other.
ROCKET TURRETS.  Not the same as the regular turrets.  These guys
move through a full 360 degree fire arc, but they move really
slowly.  If they see you, they'll pause for a good second before
firing a rocket at you.  In that second, you want to get out of the
way.  Seriously.  One rocket hit equals death.  Rocket turrets cannot
be defeated or destroyed - even if you trick them into shooting
themselves, even a rocket hit does not kill them.  They can, however,
be mercilessly exploited, as we shall see.
======================================================================
MAIN GAME WALKTHROUGH ================================================
======================================================================
The walkthrough is broken down with the following section headers,
which you can search for (turn on case sensitivity):
PRELUDE
TEST 1
TEST 2
TEST 3
TEST 4
TEST 5
TEST 6
TEST 7
TEST 8
TEST 9
TEST 10
TEST 11
TEST 12
TEST 13
TEST 14
TEST 15
TEST 16
TEST 17
TEST 18
TEST 19
THE CAKE
GLADOS
PRELUDE --------------------------------------------------------------
"Hello and again welcome to the Aparture Science Computer Aided
Enrichment Centre.  We hope your brief detention in the relaxation
vault has been a pleasant one.  Your specimen has been processed and
we are now ready to begin the test proper.  Before we start, however,
keep in mind that although fun and learning are the primary goals of
all Enrichment Centre activities, serious injuries may occur.  For
your own safety and the safety of others, please refrain from
*static*.. and back.  The portal will open in 3, 2, 1.."
[Note: the music you hear on the radio here is actually the ending
song, in a different form.]
1. Walk through the yellow portal and around the cell into the next
room.
2. Pick up the cube and drop it on the button.
"Excellent.  Please proceed into the chamber lock after completing
each test.  First, however, note the incandescent particle field
across the exit.  This Apature Science Material Emancipation grid
will vapourise any unauthorised equipment that passes through it; for
instance, the Apature Science Weighted Storage Cube."
3. Walk through and get in the lift.
TEST 1 ---------------------------------------------------------------
"Please place the Weighted Storage Cube on the 15 hundred megawatt
Aperture Science Heavy Duty Supercolliding Superbutton."
1.  Fall down from the entrance platform and turn 180 degrees to find
the yellow portal.  Wait for the yellow portal to change to the cube
chamber.  Go through the yellow portal and pick up the cube, then
return through the blue portal (if it has disappeared, wait for it to
reapper).
2.  Wait for the yellow portal to change to the button chamber, then
go through the yellow portal and drop the cube on the button.
"Perfect.  Please move quickly to the chamber lock as the effects of
prolonged exposure to the button are not part of this test."
3.  Return through the blue portal, then wait for the yellow portal
to change to the exit gate.  Walk through and get in the lift.
TEST 2 ---------------------------------------------------------------
"You're doing very well.  Please be advised that a noticable taste of
blood is not part of any test protocol, but it is an unintended side
effect of the Aperture Science Bacterial Emancipation Grid, which may,
in semi-rare cases, emancipate dental fillings, crowns, enamel, and
teeth."
1.  Pass through the door and down the stairs, then wait for the blue
portal (it may take a while).  Pass through it and fall down, then
get the portal gun.
"Very good.  You are now in possession of the Aperture Science
Handheld Portal Device.  With it, you can create your own portals.
These intradimensional gates have proven to be completely safe.  The
Device, however, has not.  Do not touch the operational end of the
device.  Do not look directly at the operational end of the device.
Do not submerge the device in liquid, even partially.  Most
importantly, under no circumstances should *static*."
2.  Place the blue portal on any wall and walk through it to the exit
door, then pass through and get in the lift.
TEST 3 ---------------------------------------------------------------
"Please proceed to the chamber lock.  Mind the gap."
*  Shoot any portal onto the wall behind the security camera, while
the other portal is open, to destroy the camera.  You can destroy any
camera in the game this way.  You don't ever have to do this, but
destroying them all gets you the Camera Shy achievement.  From now on
I will only mention the locations of security cameras.
1.  Shoot a blue portal onto any wall and pass through it to cross the
first gap.
2.  Shoot a blue portal onto the wall across the second gap, then pass
through the yellow portal to cross the second gap.  Get in the lift.
"Well done.  Remember, the Aperture Science Bring your Daughter To
Work Day is the perfect time to have her tested."
TEST 4 ---------------------------------------------------------------
"Welcome to Test Chamber 4.  You're doing quite well."
*  Security Camera.  "To ensure the safe performance of all authorised
activities, do not destroy vital testing apparatus."
1.  Shoot a blue portal onto the floor underneath the cube dropper
(you can wait for a cube to fall first if you like and then aim under
it).
2.  Collect the cube from the yellow portal and drop it on the button.
"Once again, excellent work.  As part of our required test protocol,
we will not monitor the next test chamber.  You will be entirely on
your own.  Good luck."
*  Security camera. "For your own safety, do not destroy vital testing
apparatus."
3.  Get in the lift.
TEST 5 ---------------------------------------------------------------
1.  Go to the pit at the back of the room and shoot a blue portal
under the cube.
2.  Shoot the blue portal onto any wall and pass through.  Get the
cube and drop it onto one of the buttons.
3.  Pass through the blue portal again onto the upper platform.
*  Security camera on the wall to your right.  "Certain objects may be
vital to your success.  Do not destroy testing apparatus."
4.  Shoot the blue portal onto the wall behind the opposite platform,
then pass through the yellow portal.  Get the cube and drop it onto
the other button.  Go through the opened gate.
"As part of a required test protocol, our previous statement
suggesting that we would not monitor this chamber was an outright
fabrication.  Good job.  As part of a required test protocol, we will
stop enhancing the truth in 3... 2... *static*"
5.  Shoot the blue portal onto any wall.  Pass through and get in the
lift.
TEST 6 ---------------------------------------------------------------
"While safety is one of many Enrichment Centre goals, the Aperture
Science High Energy Pellet seen to the left of the chamber can, and
has, caused permanent disabilities, such as vaporisation.  Please be
careful."
1.  Shoot the blue portal onto the ceiling above the receptor.  (Note
the yellow beam indicating a straight line to the receptor.)
"Unbelievable.  You, subject name here, must be the pride of subject
hometown here."
2.  Go up on the elevator platform and get in the lift.
TEST 7 ---------------------------------------------------------------
"Warning devices are required on all mobile equipment.  However,
alarms and flashing hazard lights have been found to agitate the High
Energy Pellet and have therefore been disabled for your safety."
1.  Shoot the blue portal onto the wall opposite the emitter.  (Note
the burn mark on the wall where the energy pellet is hitting it.)
"Good.  Now use the Aperture Science un-stationary scaffold to reach
the chamber lock."
2.  When the moving platform is at the maximum left side, shoot the
blue portal onto the ceiling above it, then drop through the yellow
portal onto it (you can look through the portal to get your timing
right).  Ride the portal to the exit gate and get in the lift.
TEST 8 ---------------------------------------------------------------
"Please note that we have added a consequence for failure.  Any
contact with the chamber floor will result in an unsatisfactory mark
on your official testing record, followed by death.  Good luck."
1.  Wait for the yellow portal to open.  Shoot the blue portal onto
the wall opposite the emitter (where the burn mark is).
2.  Wait for the Pellet to pass through the portal.  Once it is
moving from side to side in front of you, shoot the blue portal onto
the wall opposite the reciever (where the light is).
(If the pellet explodes halfway through, try again but be faster! :)
3.  Shoot the blue portal onto the wall at the end of the platform
where you are, and step through it onto the inner platform.
4.  Shoot the blue portal onto the wall behind where the moving
platform stops, and step through the yellow platform onto it.  Ride
the moving platform to the end and get in the lift.
"Very impressive.  Please note that any appearance of danger is
merely a device to enhance your testing experience."
TEST 9 ---------------------------------------------------------------
"The Enrichment Centre regrets to inform you that this next test is
impossible.  Make no attempt to solve it.  The Enrichment Centre
apologises for this clearly broken test chamber.  Once again, the
Enrichment Centre offers its most sincere apology on the occasion of
this unsolvable test environment.  Frankly, this chamber was a
mistake.  If we were you we would quit now."
1.  Yea, right!  Shoot the blue portal onto the floor underneath the
cube.  Let the cube fall through and then pass through yourself.
2.  Shoot the blue portal through the hole in the wall above the force
field to the distant side of the walled-off chamber, then pick up
the cube and walk through the yellow portal.
3.  Drop the cube on the button and get in the lift.
"Fantastic.  You remained resolute and resourceful in an atmosphere of
extreme pessimism."
TEST 10 --------------------------------------------------------------
"Hello again.  To reiterate *static* previous request *static* of
momentum."
1.  Wait for the yellow portal to appear on the wall above and behind
you, then shoot the floor with the blue portal and jump (don't just
fall) in.  Climb the stairs and enter the next room.
2.  Wait for the yellow portal to appear on the wall above and behind
you, then shoot the floor at the bottom of the pit with the blue
portal, jump, and fall all the way in.  Once over the pit, enter the
next room.
"Spectacular.  You appear to understand how a portal affects forward
momentum, or to be more precise, how it does not."
3.  Shoot the blue portal onto the wall above and behind you, then
jump and fall into the yellow portal.  You should land on the
platform with a marker tile with 2 circles on it.
"Momentum, a function of mass and velocity, is conserved between
portals.  In layman's terms, speedy thing goes in, speedy thing
comes out."
4.  Wait for the wall above where you previously were to move forward,
then shoot the blue portal onto it and jump and fall again into the
yellow portal.  Get in the lift.
TEST 11 --------------------------------------------------------------
"The Enrichment Centre promises to always a safe testing environment.
In dangerous testing environments, the Enrichment Centre promises to
always provide useful advice.  For instance: 'The floor here will
kill you.  Try to avoid it.'"
* Security Camera on the wall behind you as you come in. "Vital
testing apparatus destroyed." (This is repeated for every camera from
now on.)
1.  Shoot the blue portal onto any wall.  Wait for the portal to
change to a platform where it's safe to walk, then pass through and
press the red button.  It opens a door on the opposite wall; quickly
shoot the blue portal through it onto the far wall of the chamber
within.
2.  Wait for the yellow portal to reappear behind you and pass through
it.
3.  Look through the large window.  When the yellow portal is about to
be opposite the reciever, shoot the blue portal opposite the emitter
in this room (look for the burn mark).  Remember to allow time for the
pellet to get to the portal - shoot as early as you can.
4.  Shoot the blue portal onto any wall.  Wait for the portal to
change to the moving platform, then walk through and get on it.  Ride
the moving platform to the centre of the room and get the upgraded
portal gun.
"The Device has been modified so that it can now manufacture two
linked portals at once.  As part of an optional test protocol, we are
pleased to present an amusing fact: the device is now more valuable
than the organs, and combined incomes, of everyone in subject hometown
here."
5.  Press the red button that appears when you get the upgraded portal
gun, and shoot the blue portal through it at the far wall.  Get back
on the moving platform and ride it to the yellow portal, then pass
through.  Get in the lift.
TEST 12 --------------------------------------------------------------
"*static* fling yourself.  *static* fling into spa- *static*."
1.  Shoot a blue portal at the wall opposite you over the pit, and a
yellow portal into the bottom of the pit.  Jump and fall through
the yellow portal and use momentum to reach the platform above your
original location, with a two-dot marker.
2.  Shoot the blue portal onto the wall further above and further
forward of the previous one, then repeat the jump and fall to land
on the platform with a three-dot marker.
3.  Shoot the blue portal onto the wall behind the red button, that
is angled at 45 degrees, and repeat the jump and fall through the
yellow platform to land on the platform with a cube.
4.  Get the cube, jump down (no need to portal) and put the cube on
the button.
5.  Repeat the jump and fall to get back to the platform with the
cube.  Go through the exit gate and get in the lift.
"Wheeeeeeeeeeeeeeeeeeeeee *static*"
TEST 13 --------------------------------------------------------------
"Now that you are in control of both portals, this next test could
take a very, very, long time.  If you become light-headed from thirst,
feel free to pass out.  An intubation associate will be dispatched to
revive you with peptic salve and adrenaline."
*  Security camera on the wall behind you as you enter.
1.  Shoot the yellow portal onto the wall on the upper floor, behind
the cube.  Shoot the blue portal onto any wall near you.  Pass
through, get the cube, fall down with it and put it on the button,
then pass through again and go through the opened gate.
*  Security camera on the wall behind you as you enter the larger half
of the chamber.
2.  Shoot the blue portal onto the wall in front of the emitter and
the yellow portal onto the ceiling in line with the reciever.  Wait
for a pellet to hit the reciever.
3.  Shoot the blue portal onto the ceiling above the moving platform
and the yellow platform onto any wall you can reach.  Look through
the portal to get your timing right to pass through and land on the
platform.  Get the cube and fall back to the floor.
4.  Shoot the blue portal onto the ceiling above the left-hand button
(the one with a one-dot marker above it).  Look through the yellow
portal to check your positioning.  Once done, "post" the cube through
the yellow portal (you can go through too if you like, but you don't
have to)
5.  Shoot the blue portal through the high-up gate you came through
from the first chamber.  Enter the yellow portal to go back to the
first chamber.  Shoot the blue portal onto any wall you can reach,
then take the cube off the button and pass through the portal.
6.  Shoot the blue portal onto the ceiling above the other button (the
one with a two-dot marker above it).  "Post" the cube through the
yellow portal.  The gate should open.
7.  Shoot the blue portal onto the wall above the gate.  Go through
the yellow portal, go through the gate and get in the lift.
"As part of a previously mentioned required test protocol, we can no
longer lie to you.  When the testing is over, you will be.. missed."
TEST 14 --------------------------------------------------------------
"All subjects intending to handle high energy gamma leaking portal
technology must be informed that they may be informed of applicable
regulatory compliance issues.  No further compliance information is
required or will be provided, and you are an excellent test subject."
1.  As you enter the area, turn left and walk towards the pit.  A
set of stairs will appear.  Climb it.
2.  Shoot the blue portal onto the wall opposite where the cube is.
Wait for the staircase to disappear, then shoot the yellow portal
onto the floor where it used to be, and jump from the upper platform
into the yellow portal to fling yourself to the cube.
3.  Get the cube and put it on the button.  Turn back and shoot the
yellow portal onto the ceiling above the reciever on the upper
level.
4.  Pass through the gate that the button opened and jump across the
moving platforms (old school!)  Once you get to the other side, shoot
the blue portal onto the wall opposite the emitter and wait for the
pellet to hit the reciever.
"Very, very, good.  A complementary victory lift has been activated
in the main chamber."
5.  Pass through the blue portal yourself (hey, why not!) to land on
the reciever (it does you no harm to land on an active reciever) then
walk to the elevator platform in the main room and get in the lift.
TEST 15 --------------------------------------------------------------
"The Enrichment Center is committed to the well-being of all
participants.  Cake, and grief counselling will be available at the
conclusion of the test.  Thank you for helping us help you help us
all."
*  Security camera on the wall behind you as you enter.
1.  Shoot the blue portal onto the extruded wall above and behind you
as you enter.  Shoot the yellow portal onto the floor and jump into
it.  As you fall, shoot the yellow portal onto the floor again at
the point where you are about to land.  Keep doing this until you are
flung through the force field.  Move into the next room.
*  Security camera on the wall behind you as you enter.
2.  Shoot the blue portal onto the wall opposite the emitter and the
yellow portal onto the wall anywhere opposite the chamber with the
reciever in it.  Wait for the pellet to pass through the portal,
and then quickly pass through the force field before the pellet
passes back through the portal. (Passing through a force field
destroys all your portals.)
3.  Quickly place the blue portal on the wall where the pellet hit
(look for the burn mark) and the yellow portal on the ceiling above
the reciever.  Wait for the pellet to hit the reciever.  Get on
the elevator platform and move to the next room.
4.  Shoot the blue portal onto the extruded wall above and behind you
as you enter.  Facing in the direction that you entered, turn left and
pass through an arch into a small sub-chamber.
* Security camera on the left hand side of the sub-chamber.
5.  Shoot the yellow portal onto the bottom of the pit in the sub-
chamber.  Jump and fall through and, just as in step 1, shoot the
yellow portal onto the floor again when you are just about to land.
Keep trying steps 4-5 until you are flung through the force field.
6.  In the new area repeat the same process as in step 1 to get
through the force field.  Take care not to drift to the side or you
may hit the energy pellet.
7.  Shoot the blue portal onto the wall that the energy pellet is
hitting AFTER it's bounced off the 45 degree angled wall.  Shoot the
yellow portal onto the flat wall opposite on the other side of the
angled wall.  Wait for the pellet to hit the reciever.
8.  Repeat the step 1 process *AGAIN* to get back through the force
field.
9.  Pass through the arch in this area and use portals to cross the
backwards moving platforms over the killer floor.  Use the following
procedure: shoot the blue portal onto the wall facing you at the first
corner of the passage.  Then shoot the yellow portal onto the outside
wall, wait for there to be a platform behind the portal and step
through.  Quickly turn and shoot the blue portal at the facing wall of
the second corner of the passage and ride the platform back to the
outside.  Again wait for there to be a platform behind the yellow
portal and pass through.  Now you should be able to see the room at
the other end, shoot the blue portal into the room, but do not shoot
directly forward as a metal portal-proof pillar there blocks you -
shoot to the side of the pillar.  Then shoot the yellow portal onto
any wall in the passage and pass through it.
*  Security camera, probably opposite you.
10.  Ride the elevator platform in the far right corner of the room
up into the chamber there.  Shoot the blue portal onto one of the
walls of the chamber.  Look across the room at the high-up chamber
in the opposite corner and shoot the yellow portal there.
11.  Very quickly press the red button in the chamber you're in,
rush through the blue portal, press the red button in the chamber
you arrive in, then from the window of the chamber shoot the blue
portal in front of the emitter and the orange portal in front of
the reciever.  Wait for the pellet to hit the reciever.  Get on
the elevator platform and get in the lift.  Phew!
"Did you know, you can donate one or all of your vital organs to the
Aperture Science Self-Esteem Fund for Girls?  It's true."
TEST 16 --------------------------------------------------------------
"Due to mandatory scheduled maintenance, the appropriate chamber for
this testing sequence is currently unavailable.  It has been replaced
with a live fire course designed for military androids.  The
Enrichment Centre apologises for the inconvenience and wishes you the
best of luck."
* Security camera right in front of you as you round the corner.
1.  Push over the turret facing to the left in the first area.
* Security camera right in front of you as you round the corridor
corner.
2.  Facing the left-hand arch, quickly enter the beam and shoot the
blue portal onto the wall behind the turret.  Move quickly out of
the archway before the turret fires.  Shoot the yellow portal onto
any wall, pass through and push the turret over.
3.  Repeat the same procedure with the turret in the alcove on the
left hand side of the corridor.  This turret is quicker to fire so it
may get you once or twice, but you can still shoot a portal behind
it, then use the opposite portal on any wall to get behind it and
push it over.
* Security camera above the turret in the alcove.
4.  Hide behind the glass to prevent the next turret shooting you, and
move until it shuts down.  Then quickly step in front of the glass and
shoot the blue portal onto the ceiling above the turret (note the
"X").  Again the turret may tag you, don't worry.  Shoot the yellow
portal onto the floor.  Pick up one of the cubes and drop it through
the yellow portal to smack the turret on the head.  DO NOT GO THROUGH
THE PORTAL YOURSELF or the second turret, opposite, will shred you.
5.  Hug the wall very closely to shoot the blue portal onto the
ceiling above the second turret (notice another red X).  Drop the
second cube through the yellow portal and brain the turret.
*  Having moved the two cubes, you can move into the "secret" area
they were obstructing to see interesting things.  Were those cubes
even supposed to be here, and part of the test?
6. Once you are sure the turret's dead, pass through the yellow portal
yourself, and land behind the cube, further into the corner. Crouch
and push the cube forward, hiding behind it to avoid the next turret's
fire.  Shoot the blue portal behind the turrets, then hide behind the
cube and make a quick sprint across the opening back to an area with
a portal-able floor.  Shoot the yellow portal onto the floor, and fall
down.  Push over the two turrets.
7. Carefully move across to the side nearest you of the furthest door,
and shoot the yellow portal onto the X on the ceiling above the
corner turret, then hide behind the frame before it shoots you.
Quickly run across the door, then shoot a blue portal UNDERNEATH the
nearest turret to the door.  Enjoy the hilarious dialog as the turrets
kill each other ("Aaaaargh!  It's me!  My fault!") and rack up your
Friendly Fire achievement.
(Also, in this room, if you move carefully before killing any of the
turrets, you can make the turret in the far right corner shoot the
turret near the entrance, which makes it shriek "Don't shoot!" :) )
8.  Just for a laugh, let's do it again.  Enter the room and move to
the right, using the corner to hide from the turret in the far right
corner.  Shoot the yellow portal onto the X above it.  Now, go to
the room next door and get a cube to drop on the button and open the
exit gate (drop the cube quickly to avoid getting shot).  You'll see
the tell-tale line that says there's another turret beyond the gate.
Again use the room's internal corner to hide from the turret as you
move up to the exit gate and shoot the blue portal through the
gauze wall underneath the turret in the next room.  Whack!
*  Security camera above where the third turret was.
9.  Shoot the yellow portal at any safe wall and pass through.
*  Security camera on the wall of the chamber where the turret was.
10.  Shoot the yellow portal at the wall by the side of the turret in
the next chamber.  Move to the side of the grille to see the side
wall.  Shoot the blue portal at any safe wall, pass through, push the
turret over and get in the lift.
"Well done, android.  The Enrichment Centre once again reminds you
that android hell is a real place where you will be sent at the first
sign of defiance."
TEST 17 --------------------------------------------------------------
"The Vital Apparatus Stand will deliver a Weighted Companion Cube in
3.. 2.. 1.."
1.  Pick up the cube.
"This Weighted Companion Cube will accompany you through the test
chamber. Please take care of it."
2.  Use the cube to climb the stairs in the next room.  Drop it on the
floor, jump on it, jump up onto a stair, then look down from the stair
and pick the cube up.  Repeat this to climb two stairs.
3.  Pick up the cube and hold it in front of you as you move down the
tight corridor.  It should deflect any energy pellets fired at you by
the emitter at the end, although you can crouch behind it to be sure.
For future reference, this corridor is corridor A.
"The symptoms most commonly produced by Enrichment Centre testing are
superstition, percieving inanimate objects as alive, and
hallucinations.  The Enrichment Centre reminds you that the Weighted
Companion Cube will never threaten to stab you and, in fact, cannot
speak."
4.  Keep holding the cube towards the emitters as you enter the next
room.  Wait for the right hand emitter in front of you to actually
emit a pellet, and then quickly run backwards up the staircase
opposite it to block the pellet with your Cube.  Walk backwards down
the corridor, holding the cube in front of you.  (Don't just enter the
corridor without waiting for a pellet to be emitted first, because
there may already be a pellet in the corridor that will hit you in the
back.  If you go down holding the cube forwards, the active pellet may
expire while you are in the corridor and you will be shot in the back
by the emitter.)  This corridor is corridor B.
* Security camera on the wall behind you at the end of this corridor.
5.  Fall down from the high platform in the next room.  There is a
pushed-out wall just behind you as you fall.  Use portals to enter
it to find a rather disturbing secret area.
6.  Leave the secret area and enter the archway on your left, holding
the Cube.  Use the cube to deflect the Pellet into the reciever.
* Security camera above the archway.
7.  Use portals to return to the upper ledge where you entered the
room, and shoot the blue portal onto the wall tilted 45 degrees,
opposite the reciever.  Shoot the yellow portal onto the wall at the
end of corridor B, to capture the pellet that was trying to kill you
earlier.  Wait for the pellet to hit the reciever.
"The Enrichment Centre reminds you that the Weighted Companion Cube
cannot speak.  In the event that the Weighted Companion Cube DOES
speak, the Enrichment Centre urges you to disregard its advice."
8.  Walk back to corridor A, and shoot the blue portal onto the very
end of the corridor (you can do this without entering the corridor),
again to capture the pellet.  Shoot the yellow portal somewhere
harmless to keep the pellet out of the way.
9.  Return to the main area and shoot the yellow portal onto the
pushed out wall (where the secret area was).  Get the Cube. Carefully
enter the archway opposite the portal (watch out for the pellet).
Walk to the raised button at the back of the wall and