Successfully complete the game on any difficulty setting and wait for the credits to
end. The game will show the Monitor fly across the screen and laugh.


Unlock New End Movie
Beat the game on the Legendary setting to unlock a longer, different final movie.

Alternate ending sequence
Successfully complete the last level of the game in campaign mode under the
legendary difficulty setting. The new ending features a human and alien fighting
hand to hand. The human will say "Its over", and then they hug because they
know the explosion will kill them both.

Defeating Flugs
In the later levels of the game you will encounter new enemies called Flugs. These
enemies will be small at first, but they will attack and control anything alive. Use a
shotgun on these baby Flug as they tend to group in large numbers. By using the
shotgun it will send a storm of bullets and kill most of them that are around. Use a
shotgun on the possessed Flug, and it will kill most of them in one shot. This is
made easier by the fact that most of them carry shotguns.

Defeating Grunts
When the Grunts are sleeping you can beat them to death with the butt of your
gun without waking up any of the other Grunts. You can usually kill a four to seven
of them before an alien spots you. They start sleeping in level 5, Assault on the
Control Room. Just remember not to shoot or they will wake up.

Defeating Jackels
Use a photon weapon to destroy a Jackel's shield quickly. When you encounter a
Jackel, run up and hit it with your weapon or get out a gun that uses bullets, not
energy.

Covenant dropship
When Covenant dropship is getting ready to unload a group of Covenants, throw a
grenade into the door as it opens. The blast will kill several of the enemies since
they are all in one area.

Assault On The Control Room: Spinning ring
At the Halo start up screen, choose multiplayer mode. Choose cooperative play at
the next screen, then choose your profiles at the next. Choose the level where in
the beginning it says, "I would have been your daddy" (Assault On The Control
Room). On the difficulty screen, choose legendary. When the level starts after the
introduction sequence, have one of the players quickly press X when the "Press X
to get on the Pelican" message appears. That player will re-board the ship and
start flying with it down the hole. The other player will quickly die because of the
aliens, and will be respawned on the spinning ring. Make sure to jump where there
are gaps. If you are good enough, you can even jump to a nearby ledge.
Additionally, once you are respawned on the ring, quickly jump off and fall to your
death. Sometimes you will be respawned on the lowest ledge in all the blue haze,
and a "Press X to flip the Pelican" will appear that the top of the screen very briefly.

Unlock New Guns
To unlock two new guns, first beat the game on the easiest setting (Easy), and
then on the hardest setting (Legendary) in under 3 hours.

Fireworks
Through one plasma grenade in a wide open spot, then stick another directly on
top of it if you do this fast enough the first gernade will launch the second and
vuaola fireworks.

Your in My Seat
When one of your computer controlled buddies is in a vehicle spot/seat you want
simply go over to that spot and press X. They will graciously move.

Infinite Grenades
To get infinite grenades, scorpion, and ghost in multiplayer- Go to the multiplayer
screen: go to edit game types: In that menu you will have the option to make up
your own game type.

Shortcut
Play "Assault on the Control Room". It doesn't matter what difficulty setting or if
you are playing 1 or 2 player mode. Get to "If I only had a super weapon". Rush
right ahead and ignore the Jackals and the first Elite. Instead, kill the second one
as he is somind over the hill. Then run to the next one who is coming around the
banshee. If you kill them both, the two banshees will be yours for the taking. I
would suggest using the Plasma Rifle for killing them, as it stuns. You can use the
2 banshees for a banshee fight with a friend, too. Anyways. Ignore the enemies
and do not go to the end of the bridge. Instead, go to the top of the hill that leads
to the Control Room. There will be no Hunters, or aliens on the way up the hill!
There will be the enemies that come out of the big door, though, but this shave's
precious time off the level.

How to get a Banshee sooner than the bridge
Assault on the control room: How to get a Banshee sooner than the bridge, 1
player.

Fight your way through the level to the first snowy open area, kill the enemy tank
and all the rest of your enemies then hop into the Warthog. Make sure you get the
Rocket Launcher and the Sniper Rifle. The next open area has a battle raging and
an empty Scorpion, hop into the Scorpion and waste all the Covenant with the
cannon. To the left is tunnel, to the right is the obvious way to the next open area,
go to the right and clear the enemies around the corner. Stop (If you kill all the
enemies in the next open area an Elite will get the Banshee before you do and use
it to attack you. You'll know you're in the right place if there's another enemy tank
in the area.) Now, jump out of the Scorpion and stay to the Left edge of the valley.
Look up, you should see a Ledge above you with some lights on the underside.
The Banshee is on that ledge so get underneath it and shoot some rockets up to
knock it off. Remember to move something forward with concussion weapons you
have to shoot behind it, so use you brain. If done correctly off will tumble the
Banshee, if done incorrectly it will be pushed farther in. As an added bonus the last
few sections of the level will have no enemies due to the fact you've skipped so
much.

Plasma Grenade
If your going to use a plasma grenade, try throwing the grenade on the alien
where it sticks onto them. It will blow up on them making sure it will kill the alien.
Also the aliens can do this to you if you don't move.

Name in Blood
In the very last level of the game, as you're driving the Warthog out of the Pillar of
Autumn, on the second jump, do not go all the way across. Then back into the
room thats behind you and get out. if you look on the wall the name REX will be in
blood on the wall.

Hungry Grunt
In the very last level of the game, as you're driving the Warthog out of the Pillar of
Autumn, get out at the 2 tunnel off of the main one and there will be a grunt at the
end of it. he should say something like " I can't wait to get back to the ship and eat
some grub!"

Good tactic for legendary
Here's a good way of killing elites or hunters in legendary. get a needler and some
ammo and just unload it on an elite and watch the show --NOTE-- You have to get
in close enough for the needles to find their mark, and the delay until they explode
leaves you wide open for their plasma rifle, so bring a backup weapon.

For the hunters, unload an entire clip at their backs so the shot doesn't reflect off
their shield and start shooting at them with another weapon while waiting for the
needles to explode (or just sneak up on one and smack him in the back, and if you
cant to that...a well placed plasma grenade to the head should weaken it, but it will
most likely just piss it off.)

Silent Level shortcut
This will help if your annoyed by always having to go back because the yellow
dude locks the door. First find a warthhog and get some people inside. Go where
the place where there are lots of guys and where kortana says the covenant are
putting up a real fight. Go down completely with your warthhog and go at full
speed directly where the yellow dude is. If you did it right then your warthhog will
be half way through. Press forward and get out. Then pass the level like you
usually do and come back where the warthog is stuck. You may think it is
impossible to get out but just press back and then get out. You will be in back of it
and now you're done the hard part!

Elite Kill Trick
In the levels where you must face the Covenant there are certain aliens called
Elites. They are the big ones which are usually blue, red, or sometimes yellow. If
you have a gun with a scope ie; pistol or sniper rifle,try to get behind an elite
without being seen by it. Next, Zoom in at the back of it, you will see yellow spots
on his back or his head. If you shoot them a yellow liquid sprays out and they die
instantly. This cheat helps because you only need to use 1 bullet and you do not
have to get in close to kill it. It also looks cool when the yellow stuff sprays out.

Kill Master Chief in Cinematic
This is only possible to do in co-op mode, so get a friend to help out.

Near the end of "Assault on the Control Room", at the base of the big pyramid-
type building, rush over and steal a Ghost from the two parked ones.

Get the Ghost (in one piece) to the top of the pyramid (Get your friend to do the
fighting while you take care of the Ghost). Open the large blast doors, kill
whatever is in your way, and keep going down the hallway.

When you reach the VERY LAST door (ie. The one that triggers the cinematic),
stop. Line the Ghost up with the centre of the door as best as you can, and back it
up about one or two Ghost-lengths away. Have your friend hit the switch to open
the door, wait a half-second or so, and then gun it towards the door.

If your timing was right, the Ghost should JUST fit between the doors, and during
the cinematic the Ghost (now without a pilot) will mow down Master Chief from
behind, killing him. The cinematic will go on as normal, except for the absence of
Master Chief (you will still hear his voice, though). Also, in certain camera angles,
you will see Master Chief's corpse in different poses, such as tilting 45 degrees to
the left with his gun stuck in the ground.

It will work more than once (I've done it three times so far), and it just looks
damn funny to see Master Chief get run down by his own Ghost. Props to The
Fiend for co-piloting.

The Yeti
This isn't so much a code. It's just something that shouldn't be where it is. In the
level "Guilty Spark 343", there is a crashed Covenant dropship just around one of
the corners you must turn (the second or third, I believe). Up above this dropship
is a tree jutting out over a ledge. On this object is a Flood-infested Elite (the
bulkier Flood ones that don't pop). It appears as you come around the corner and
runs back along the log after a few seconds then disappears. It is named 'The Yeti'
because it diappears whenever seen. This is really weird because the Flood have
yet to be introduced at this point. Also, the Yeti is invincible. You can sneak up on
it from behind (which is too long and tedious a subject to go into), but don't have
your co-op partner go around the partner until you're in position. It can withstand
a pistol whip to the back of the head and a plasma grednade, so we just gave up.
It's really fun, though. I suggest you try it.

Faster reloading
To reload most weapons faster, press X, then shortly after that
press B to melee. Note: For the shotgun this will cause you to stop
reloading all together.

Extra shotgun ammunition
Take a shotgun that has 12 shots and 0 clips. After you shoot it
a few times, you should be able to reload manually. You can do this
about ten to twenty times.

Faster Warthog weapon use
This trick works best in multi-player mode. Drive the warthog in
a straight line. When you see an enemy, jump out of the Warthog.
Tap X repeatedly and sidestep to the right. If you are quick enough,
you will exit the Warthog and jump on the LAAG gun without stopping,
while the Warthog slows down. This also works well on ice, because
you keep sliding.


Defeating Flood types
Do not try to take out any Flood types with a sniper rifle. It will
simply go through their bodies without killing them. The weapon
of choice is the shotgun. You can take them down with one shot.
Remember, the closer they are, the faster they fall. On the small
crawling Flood, use your assault rifle in short controlled bursts.
Once one pops, it will also pop the ones nearby. Save shotgun and
pistol ammunition for the working class Flood to drop them fast.
It is also a good idea to hit them with your gun after they fall
to make sure they are dead. On the fat Flood, use the shotgun to
pop them, then clean up with rifle. When you first meet the Flood,
they will outnumber you in groups. For the large Flood, use a shotgun,
rocket launcher, or most importantly, a fragmentation grenade. Do
not use a plasma grenade because they will run towards you and kill
you. When you get attacked by the Flood, after you make them fall
down the first time, shoot their head off while they are on the
ground. They will not get back up.

Defeating Hunters
Normally Hunters are the hardest Covenant to kill, due to their
powerful armor and shields. However, even the strongest armor has
weak spots. If you look at their necks or backs, you can see an
orange spot. Aim for it. One shot with any gun will kill them if
you hit them there. The best way to kill a hunter is to use a sniper
rifle to zoom in on the orange spot. If you are being chased by
a Hunter or an alien with a sword, run backwards while facing the
alien. Jump when they try to slash you. Throw a plasma grenade at
the alien and it will stick to him. Turn around and run in a zig-zag
pattern to make sure he does not catch you in the explosion. If
you are playing cooperative multi-player mode, have player two run
in front of the Hunter until his back is turned to player one. While
the Hunter is trying to turn player two into mush, have player one
run up to the Hunter's back and melee attack the orange spot. The
Hunter should die with one hit. You can kill the Hunters in a head-on
assault. Get in close and use the pistol or shotgun. Aim for the
head holding down the trigger. Your first shot(s) will knock back
the head, exposing the unarmored neck. One shot in the neck and
they will die.