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.

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

Hint: 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.

Hint: 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.

Hint: Defeating Covenants:
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.
There are places (especially in the first level) where a groups of Covenants are, waiting for you to barge in and start shooting. If you can, sneak to the aliens and throw a grenade into their midst. It is best when a plasma grenade sticks to a Grunt, because he will run behind the rest of his companions. One simple grenade can take out five Covenants.

Hint: 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.

Hint: 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.

Hint: 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.

Hint: 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.

Hint: Defeating Jackals:
Use a photon weapon to destroy a Jackal's shield quickly.
When you encounter a Jackal, run up and hit it with your weapon or get out a gun that uses bullets, not energy.
When you are a far way away from Jackals and have a sniper, they will sit in the defense position and leave very little uncovered. You will notice that on the right or left is a small notch in the shield. Aim for it and the Jackal population will be severely decreased.

Hint: 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.

Hint: Assault On The Control Room: Fun with weapons:
Where you cross the bridge, and all the little guys are sleeping, press B to hit them and quickly kill them. Leave one on the left or right still sleeping. Throw a plasma grenade on the turret. They will scream and sometimes get in the turret. Get back and watch the him fly out of the turret and fall to the ground very far below. Sometimes the turret will fall on him. When the dropship flies over and the other people with the shields start shooting at it, go up behind them and throw a plasma grenade on his head. He will run around and explode. Sometimes, he will fly all the way down to the ground below. Finally, when you get to the Banshees (flying alien vehicles) fly as high as you can. Then, floor it to the ground and hit people on the ground. Press L to shoot missiles and R to shoot lasers. Also, you can fly as high as you can and jump out. You will fall for a while, then hit the ground with a big "ch-wunk".

Hint: Assault On The Control Room: Music from Myth:
Get towards the end of the level. Take a Banshee in the open area and go up to the Control Center. Locate the middle ledge that are around the central pillar in front of the door. Maneuver the Banshee so that is parallel to the walkway, and facing the left (with respect to the door), then land. Get out of the back carefully without falling. Walk to the right edge of the ledge and remain idle to eventually hear music from the PC game Myth.

Hint: Assault On The Control Room: Early Banshee:
Get the rocket launcher and sniper rifle from the area where your men are fighting near a flipped Warthog. Play the level until you get to the Scorpion Tank. Take the tank through the cave. There will be a small hill after the cave. Kill the Wraith Tank from on top of the small hill. Take any enemies out without passing the small hill. Get out of the tank and turn around to your right. Look up and you should see a platform with a blinking light. Note: if you move past the little pond that the Wraith Tank was on, there is an elite guard there that will pilot the Banshee, thus costing you to lose the chance of getting it. Take the rocket launcher and fire at the center of the platform (underneath). This may require a few shots. When you hit the correct location, you will see the Banshee fall off the platform and to the ground. The Banshee is now yours for the taking. You can find another Banshee on top of the large pillar in the center of the canyon after the caves.

Hint: Beach: Three Warthogs:
Get in the Warthog and drive around to the second group of trees. You will find another Warthog. Get in and proceed through out the level. When the supply ship crashes there will be another Warthog, giving you a total of three.

Hint: Halo: Fast kills:
During level 2 "Halo", you will hear the warning "Take cover -- Covent ship is in boundaries". Run into the ship that you landed in and wait for the enemies to appear. Your motion detector will indicate when they are present. They will eventually walk by, not noticing you. Throw a grenade and start shooting to kill them much faster.

Hint: Halo: Drive off cliff:
Get to the part where you can get in the Warthog and go off the cliff. Jump out of the Warthog. The Warthog will fall. You can see it fall or stay in it to fall off and die.

Hint: The Maw: Grunt message:
There is a Grunt in the level that will give you a message. To get to him, go all the way past where the drop-ship is going to pick you up. About three rooms after that, there will be a shortcut to your right. Go in it. In the middle will be two doors, to your left and right. Unlike the shortcuts, the door to your right will be open. Enter it. At the end of the hallway, get out of the jeep and the Grunt will be there. He tells you something that sounds like "It's a good thing there was food on this Starship cuz I worked up a big mighty thirst!"

Hint: The Maw: Killing enemies:
Use the following trick to kill the two Hunters, the Sentinels and the Flood. When you are in the maintenance access ways, you will see a black Grunt run from the Flood directly in front of you. Kill the Flood and turn left instead of going straight where the hunters are. Go where the Grunt went. When you get there, the Grunt will be standing in the doorway. Kill him and you should be in an enclosed room with many dead bodies on the ground. When you enter, turn to your right to find be some burning boxes. Go to them, and the Sentinels should be on the other side of the blast door. Shoot the glass and the bullets should go through the door and hit the enemies on the other side. The glass should not break, so the enemies cannot shoot you back.

Hint: The Maw: Destabilize engine:
When you open the vents, instead of going to the bottom floor to destroy the engines, jump on the coupling that is moving away from the engine. From there, destroy the engine. When the couplings start to pull back and reach the platform where the computer you pressed to pull the couplings back is located, jump back on it. Note: You cannot make the jump if you are on the white part of the couplings. To make it, there is a brown part on the very end of the couplings. You have to jump from that part to make it across.

Hint: The Maw: Save time:
On the last part when Echo 4-19 is supposed to pick you up and Cortana tells you to stop, do not do it. It is a waste of time because Echo 4-19 has been hit and crashes where you land. Keep driving straight towards the next beacon.

Hint: The Pillar of Autumn: Shields:
On The Pillar of Autumn level 1, there are some empty airlocks that the Covenants have entered from. After killing the Covenants, go inside to find two extra shields. These shields are better than your normal shield protection.

Hint: The Pillar of Autumn: Different messages from Marine captain:
Depending on which difficulty setting you select, the captain of the Marines says a different motivational speech. From something soft in the easy setting, to something brutal with the legendary setting.

Hint: Multi-player mode: Instant kill:
When you are facing a partner in multi-player and you cannot find ammunition, sneak up behind him and hit him in the back for an instant kill.

Hint: Multi-player mode: Instant full life:
This trick works better in cooperative mode. If you need life and you have a partner, wait until you have killed 90% of the enemies around you. Then, have your partner hit you in the back with a gun. You will respawn with full life and assault rifle ammo. In single player mode, you can frag yourself but your weapons might fly across the screen and you will need to find them.

Hint: Multi-player mode: Extra ammunition:
In cooperative mode, have your friend kill you by hitting you in back with a melee attack. Then, have him pick up your ammunition, respawn again, and repeat. Have him keep killing you until he is full, then have your player pick up your ammo after he kills you. You will then have maximum ammunition. Note: this only works for the machine gun.

Hint: Multi-player mode: Fly in Ghost:
Go to the multi-player screen with the Slayer, King Of The Hill, and other options. Select "Create" Allow all vehicles in multi-player. Go to either Blood Gulch or Sidewinder. You can find Tanks, Ghosts and Warthogs. Set up a Tank in a strategic place for some fun, then get out, get in a Ghost, and go as fast as you can at the tank, towards the front. When you hit it, you will fly into the air and land hard.

Hint: Multi-player mode: Warthog on top of base at Blood Gulch:
Create a multi-player game with two people and enable all vehicles. Take the Warthog and ram it in the side door leading up to the top of the base. Then, have that person hold Up so it does not fall out. Next, have the other person use the Tank and ram the back of the Warthog. If it does not pop up, try the Ghost and ram it again. if done correctly, the Warthog should pop up to the top of the base. Note: If one side does not work try the other side.

Hint: Multi-player mode: Snipe other players in Blood Gulch:
You can easily snipe the other players with a tank. Go to the end of the two parts where there is a large hill. Drive up there in a tank and aim at the other players. You will be able to see the entire level.

Hint: Multi-player mode: Completing under legendary difficulty:
If you are playing the levels in cooperative mode under the legendary difficulty setting, have one person stay behind and the other one charge into battle. Keep doing this until the room is cleared. Have the person with the worst inventory go into battle. When they lose their items when they die, you will still have the good weapons.

Hint: Multi-player mode: Recommended weapons:
The weapons of choice are a shotgun or rifle, and a sniper. This allows you good coverage for short and long-range battles. The sniper helps you take out people that unaware you are aiming at them or in tanks. The shotgun is useful in close combat. Also, do not forget melee attacks and grenades.

Hint: Multi-player mode: Fun with vehicles:
In multi-player, split screen mode, create a game type that has all the vehicles. Set up the tanks and Warthogs. Get in a Ghost and try to run into the tanks to do some really cool tricks. Your also can Get the warthog to do some tricks,

Hint: Flashlight:
When you get to the part when the people and aliens infected by the Flood start coming after you, turn your flashlight on and point it at them. The large one will stop running and jumping so that they are easier to shoot. However, if you raise your gun to reload, turn away from them or take the light off of them in any way, they will resume running around and try to kill you again. Although the creatures infected by the Flood stand still when you point the flashlight at them, they may still shoot if they have a gun, so kill them quickly.

Hint: Do it yourself grenade launcher:
Get two plasma grenades. Place a grenade down, then place the second grenade in front of it about one to two feet away. Stand back, and when the first one explodes. it will sent off a duplicate of the remaining grenade. When one of the copies stays, the other blasts off in the direction the first grenade was sent it in. Wait for the second grenade's time to go off and watch the explosion either in the air or on the ground. Note: Do not stand too close, as the grenade may cause injury, burns, and/or even death.

Hint: Rocket Launcher instructions:
If you have a gun with a scope, use it to look at the middle of the Rocket Launcher. You will see a small picture with a man holding the gun with the text "Hold This Way".

Hint: Do donut in Warthog:
Press Left Analog-stick Left and press Right Analog-stick Right.

Hint: Traitor:
On a level where you can find a group of five or more marines (such as Assault On The Control Room), kill three marines quickly. The remaining marines will call you a traitor (shouting things like "He's loco!") and will start firing at you. If you shoot them, sometimes they will ask you if they owe you money or tell you to clean the mud off your visor.

Hint: Satisfying goals and challenges:
Kill a Hunter with a melee attack (let him rush sidestep, then attack).
Kill a Golod Swordman with a melee attack (hit him with a pistol burst from very close, then immediately attack).
Run over enemies with a Warhog.
Blast groups of enemies with a Scorpion Cannon.
Skip a major part of level 5.
Shoot down a Banshee with a rocket launcher.
Shoot down a Banshee from a Banshee.
Finish the game in legendary mode.
Playing through the entire game co-op in legendary mode.
Taking out a friend (not in a vehicle) in multi-player with a plasma grenade.

Glitch: Crazy camera:
In the level 2, "Halo", under the easy difficulty setting, play through the sections normally but make sure that the last lifeboat you find is the one obtained by entering the building to find the marines. When the Pelican arrives for you to get on and fly away, go to your Warthog instead. Drive it up close to the Pelican, making sure that the side seat is facing the opening of the Dropship. If done correctly, the Pelican will fly off, but the camera will not know which vehicle to follow. The camera should fly around and go haywire. Note: This does not happen all the time.

Glitch: Bypass Assault On The Control Room:
In Assault On The Control Room, towards the end of the level you will cross a snowy bridge with two Banshees on it. Run and quickly enter one of the Banshees. You can skip the last part of the level by simply flying to the top of the large structure below, where the large door is located. If you are in cooperative play mode, have the other player die and they will reappear next to you. Have them open the door and then you can simply shoot down the masses of Covenant waiting inside. Fly inside and have the other player open the next door. The third door, before the control room and level ending sequence, is now in front of you. Arrange it so the second player is now in the Banshee and fly it directly in front of the door. Have the first player open the door. If done correctly, the Banshee will fly in, killing the first player. The game will not know what to do and will show various camera shots of places in the room. Eventually, Cortana will appear out of the console as she is supposed to and will carry out her conversation with the disembodied voice of the Master Chief.

Glitch: The Truth And Reconciliation: Shoot through door:
While on The Truth And Reconciliation level, go to the landing where the two Hunters are after you. Kill all the men there, then go to the bottom. You will notice that the Elite has closed the door, but you can still kill him. This works well when playing with a friend. Jump up and when you see him, fire through the glass. A clip or two may be required. This trick works in any location where the doors are part glass.

Glitch: Fall to death:
In level 5, the section "I Want To Be Your Daddy" is the first that you see. In order to do this trick you have to be in single player mode. When the Dropship is about to let you out, quickly press X button to sit back down in the seat. You will fly down the pit and go around in circles as the Covenant tries to shoot you down. Once you wait long enough, the Dropship disappears from sight and you will float down to your doom.

Glitch: Warthog vs. Echo 4-19:
On the "The Silent Cartographer" level, take the second Warthog on the island and put it were the Echo will crash. Resume playing the level through. When it crashes, look at the Warthog. It should be stuck in the Echo.

Glitch: Duplicating Warthogs:
Place a Warthog where the drop ship will crash, then disable the security system. When you return, there will be a Warthog a short distance from the crash and one inside it. To get it out, use the rocket launcher by the ship. Go to the right side of it and shoot by where the Warthog is located. Then, go to the left side and shoot again where the Warthog is stuck. After that, you should be able to drive it out. You can now have three Warthogs in the level.

Glitch: Wraith Tank:
On the Assault On The Control Room level, take the Scorpion Tank and flip the Energy Tank. The man will fall out. Go up to the tank and the game will say press X to flip Wraith. However you cannot drive it.

Glitch: Floating Covenant:
Throw a grenade and kill a covenant. They will sometimes land on top of the shields that you can hide behind. There are many of these in The Pillar Of Autumn level. After they land on top, destroy the shield. They will float in mid-air instead of dropping to the ground. Note: This does not happen very often.

Glitch: Dead on the other side:
On the Silent Cartographer level, when the door locks there is a window in it that you can shoot through and kill the Covenant swordsmen. Go through the level until the FMV sequence in which the swordsmen walks out begins. He will be standing on a dead version of him.

Glitch: Waiting for you:
On the Silent Cartographer level, take the Warthog down to the floor where the door locks. Make sure you have marines in the Warthog. Park it in front of the door and leave them there. Do not go too fast before the door shuts, or your wheel will get stuck in the door. Play the game through until the FMV sequence showing the covenant swordsmen running out begins. He will run right into the warthog and start shooting. The marines will also shoot at him. However, when you go back the marines will still be there,and the swordsmen will occur later as normal.

Glitch: Living dead:
In multi-player mode after someone dies, throw a plasma grenade on them. After it explodes, the corpse will fly in the air and flail its arms as if it was still alive.

Glitch: No head:
On the first level when you get out of the tube, press X when prompted to exit the cryo tube. Watch your character get out. The screen will be white and coming into view. After you take control finally, turn and jump in the cryo tube before it closes. When you get in and it closes with you inside, you are stuck. When you cannot move in the tube and look up in a certain manner you will see yourself, but with no head.

Glitch: Master Chief vs. fiery Phantom:
Go to any level that has Phantoms. Reduce the Phantom's life to one red bar. Go to a high location where you can land and stick a plasma grenade to the inside of it. Quickly get into the Phantom and fly forward. The grenade will explode and Master Chief will fly out in front of the flaming Phantom looking as if he is running from it.

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