When you begin the mission, your vision will get blurry. When it returns to normal, you
will see a blinking door. Enter it, then stop. Look up to see a fluorescent light over the
door you just used, and another one on the opposite wall. Jump and duck at the same time
to get on one of thos lights. Do the same thing again to get onto the ledge next to the
lights. Look to the left on the ledge and you should find a dark passage. Follow it to
find some grenades, a skull, and a camera at the end. Take the skull and your HUD will
disappear and the word "Blind" will be displayed. You will not be able to see your
weapon, body, shields, ammo, or HUD. You can use the skull as a melee weapon, which does
good damage to opponents. However, using a grenade, firing a weapon, trying to drive, or
using a turret will drop the skull. Additionally, you can be a passenger in a Warthog and
still keep it. To return to normal vision, save and quit the game, select the Cairo
Station mission in campaign mode, save and quit the game, then return to the Outskirts
level.

The level just has the Master Chief awakening and is stopped with the haziness. Walk
forward as if you are going to proceed through the level as usual In the first hall,
there will be a grunt. Kill the grunt but do not go outside. Stay in that hallway. Look
up in that hallway to see light type panels. If timed correctly, you can jump up onto the
panel. Beside you will be a wall that you cannot jump to. Look back and face the original
wall you were looking at when you jumped up. Throw a grenade against the wall, looking
down slightly so it will stop bouncing at your feet. When you count to about three, jump
in the air and begin to go to the wall with the slanted top. The grenade will explode and
boost you up further, putting you on top of the wall. You can then do two things. You can
look across and continue with the level or you can look the other way to find a skinny
passageway with the Blind mode skull , grenade, and camera type thing. If you continue to
use grenade jumping, you can skip major parts of the level.

At the Red base, get a Banshee. Get on top and face toward the Blue base. Turn right and
go over. Follow the wall up and close to the top. You can get out there and snipe from
this location.

The plasma sword is one of the most deadly weapons in the game. However, there is a way to
make it deadlier. If you are walking up to someone, you will see the aiming reticule turn
red. If you press the trigger or B, you will deliver a deadly lunge that can kill almost
anything in one hit. To make this even deadlier, before you reach your enemy jump and
keep aiming at him. When the reticule turns red, you will still be in the air. As you are
in the air, press the trigger or B and you will lunge forward in mid-air. This is more
deadly because you are above himm and his head is the closest thing to you when you are
in mid air.

While equipped with shotgun, get in close range and press Melee, X (reload), Shoot, Melee.
Note: You must press X immediately after the first melee is finished.

Go to multi-player mode and scroll to the Coagulation map. Read the description. It will
describe "a bloody gulch".

When caring an item (bomb, flag, etc.) quickly press Melee, X, Melee to perform a combo
melee attack. Continue pressing Melee, X, Melee, X, etc. to make the combo continue
indefinitely.

When DWing SMGs, press one shoot trigger at a time simultaneously. This disables the
reticle/aimer from going upwards. Note: This also works on other DWings.

Play the mission on the legendary difficulty setting. Continue until reaching the area
during the "push through the covenant held ruins" phase where a landing zone for the
Pelican to drop weapons must be cleared. When you reach the area where Cortana says
"They're pouring out of the center building", note the plasma turrets along the borders.
A short distance after the turret on the left side is the outline of a sealed door in a
wall. There is a rock in front of the door. Jump on the rock, then jump onto the ledge
above the door. Next, jump to the ledge to the left. Then, grenade jump onto the building
with the sealed door. On the roof of the building are two dancing Elites and a skull. Get
the skull and the word "Envy" will be displayed. You can now use active camouflage.

Play the mission on the legendary difficulty setting. Enter the structure after getting
off the gondola. Jump on the large stone block to reach a ledge leading out to the
Covenant turrets. Turn around and face towards the structure. Then, jump up to another
level around the right side of the structure. Continue to find a skull on a ledge as you
make it around. Take the skull and the word "Assassins" will be displayed. All enemies in
the game are permanently cloaked.

In the beginning of the level when you are storming the hill, it may be tempting to pass
by this part. However, stay in that area until you survive both waves of Covenant that
the Phantoms drop off. A Pelican will appear afterwards and drop off a Warthog for you
and your teammates.

When playing in co-operative mode under the legendary difficulty setting, get a grenade
launcher that is left over from the Brute on the bridge. When Tartarus jumps onto the
spinning disks, jump onto the platform with your partner, then jump on the three disks
for safety. Let your partner have a carbine rifle on the top level and have him snipe
reinforcements when they arrive. Run around the middle circle, waiting for Tartarus to
lose his shield from Sarge sniping him. Hit him with your grenade launcher. Hit him three
times, then run away and wait. His reinforcements may appear. If they do, camouflage and
run to the top level. Allow your partner to kill the Elites. Camouflage if Tartarus or
Elites come to the top level. Note: Use your Brute plasmas if you run out of
ammunition. There are some on the middle level, and perhaps the bottom level. Make sure
your partner conserves his carbine rifle ammunition. Never fight a Brute Elite, as they
will kill you in a few hits. Also, never hit Tatarus with a melee attack. Never use
grenades as Tartarus will just jump. The most important thing is to not allow your
partner to die. When doing this in single player mode, use the same tactics except when
Elites arrive, camouflage yourself then go to top level and snipe with the carbine
rifle.

When the intermission sequence ends, do not rush towards Tartarus like the others.
Instead, just wait until they all jump to the other side, then jump over there. Or, you
can wait for the moving platform to help you get to the other side. After you have done
that, Tartarus will have a sort of "fog" around him. Get a plasma gun. Note: If you
cannot find one, go to the lift, and on the top floor behind a wall there should be a box
from which you can get one. Dual wield the plasmas and fire at him until the fog goes
away. Then, keep shooting at him with the plasmas until he dies. Alternately, when his
shield depletes, drop your gun and throw a grenade until he dies. Be careful though --
stay a good distance away to avoid being hit and killed.

Get two Brute plasma rifles and run away. When his shields are down, throw grenades
then shoot him. He should die quickly.

Use a tank, push it up against the far wall by the building, and get it stuck there. Jump
on it to the top then get on the roof. Another way is go up in the building and get to
where the metal rain gutter panels are found (above the gate that opens). Get two people
up there then get on top.

When in a Banshee, press A and a direction on the Left Analog-stick. When in a Banshee,
hold A and press Left Analog-stick Down. The Banshee will do a backflip. Additionally, to
do tricks in a Banshee, press Left or Right on the Left Analog-stick and hold A to do a
barrel roll, or hold Down + A to do a loop.

At some point in the game when you are playing as Master Chief, one of you allies will do
the Howard Dean scream while they are attacking.