- Dribble Skull in Crow's Nest mission
At the beginning of the mission, grab the Skull on top of the large pipe near the ceiling before you pick up any weapons. This is easier in Co-op mode. Push RT repeatedly. This will cause Master Chief to drop the Skull, but because he has no weapons, he will immediately pick it back up, making it appear as though he is dribbling the Skull like a basketball.

- Easy experience in Multiplayer mode
Notice: This trick requires four active accounts on your console that are all able to play on Xbox Live. Enter the matchmaking lobby, and choose 'Social', then 'Rumble Pit'. Sign all four of your accounts in the lobby. In free for all modes, you have to be in the top three to earn experience points. Begin matchmaking, and it should find two additional players. Once the game begins, you can simply do nothing. Once the game ends, all four of your accounts will tie for third place, giving all of them easy experience points. -From: Brandon Adkins

- Driving vehicles through invisible walls
In certain levels in Campaign mode, you may want to take your vehicle through most of the level. However, there are invisible walls that keep the vehicle from moving past where it is needed. To pass through this, drive your vehicle through the doorway, gate, tunnel, etc. where the invisible wall is located. Just before you go through it, jump out and let the vehicle pass through the wall. This allows you to take the vehicle through the rest of the level if desired.

- Monkeys with teddy bear in Sierra 117 mission
After you come into contact with the snipers in the woods, follow the left rock path to find a strange family of monkeys keep pusheding a teddy bear.

- Armor permutations
Successfully complete the indicated task in Campaign mode to unlock the corresponding armor part in Multiplayer mode:


Elite



Spartan


- Terminal locations
The following is a list of all seven Terminal locations. To accomplish the 'Marathon Man' achievement, when you find each Terminal, press RB to view the journal. The screen will eventually begin to turn red. Wait until it turns blue again and a new entry will appear. You need to view both entries in all Terminals for it to count towards the 'Marathon Man' achievement. -From: Jared


The Ark



The Covenant



Halo


- Lower weapon
During a local match or replay, click Left Analog-stick + LB+ RB + A + Down for approximately three seconds. If done correctly, your weapon will not be visible on your screen. When you shoot, your weapon will be raised again. -From: Dirttbagg and darthvader302

- Recharge shields quicker
If your shields are down in Forge mode, press Up and they will recharge.

- Toggle panning camera
During a local match or replay, click Left Analog-stick + click Right Analog-stick + LB + RB + Up/Left.

- Stay zoomed in
If you are zoomed in as a Spartan or Elite and turn into the Monitor, press Up to turn back into your character and still be zoomed.

- Exploding grenades
Throw a grenade in the air, and shoot it with a sniper rifle.

- Evil duck in Isolation multiplayer map
In the 'Isolation' multiplayer map, go to the Flood cave where the Ghost is located. Go in front of the Ghost, look up, and walk a short distance slowly. You will see a big smudge on its face, but look carefully for the duck's body. You can partly see its face and the horns on its head. This is related to the picture in Zanzibar in Halo 2.

- Preventing lag
To clear the hard drive cache and prevent lag in Solo and Multiplayer mode, when begining the game, keep pushed A + Up. Select 'Yes' when you are asked if you want to clear the cache.

- Alternate endings
There are three endings. The first ending is shown when the game is successfully completed on the Easy, Normal, or Heroic difficulty setting. The second ending is shown when the game is successfully completed on the Legendary difficulty setting. The third ending is shown when the game is successfully completed on the Legendary difficulty setting with all Skulls activated.

- Weapon descriptions
- Bonus DLC
Successfully complete the game on the Legendary difficulty to get bonus pictures and a 'Making of' video from Xbox Live.

- Extra grenades
In Multiplayer or System Link mode, when you kill someone, slash their dead body with the Energy Sword for more grenades come out of it.

- Smarter respawning
When playing in Co-op mode on the Legendary difficulty setting, it is best to have one player keep their distance from the enemy at all times. By doing this, if the rest of the players die, they will respawn around the player that is farther back, rather than having to rebegin at the checkpoint.

- Super fast Spartan laser fire
In Forge mode, get a Spartan laser. Charge it until it is almost about to fire. Before you fire, turn into the Monitor. Fly around until you find a target. Before you turn back into a human, keep pushed RT to fire the Spartan laser almost instantly (if done correctly). You can use the Monitor's aimer to aim the laser.

- Show coordinates
During a local match or replay, click Left Analog-stick + click Right Analog-stick + LB + RB + Down/Right.

- Overcomeing Wraiths
To easily kill a Wraith and save time and ammunition, aim at the little circle on its back. It only takes approximately five to ten shots to kill it this way.

- Breathing under water in Sierra 117 mission
At the end of the level, when the Pelican arrives after you have rescued Johnson, it destroys the two Covenant ships, one being above the water just outside of where Johnson is held. The other one is above the water in the place just before the Pelican lands. You can climb in. Once the Covenant ship is destroyed on the side where it picks you up, the debris that remains will float on the water. Jump onto it, and let it sink. After that, all you can do is just jump from one piece of debris to the other. If you touch the ground, you will die.

- Katana
Successfully complete all achievements (1000/1000) and find all Skulls to unlock the Katana.

- Crouching
To crouch, click and keep pushed the Left Analog-stick. While crouched, you will not appear on motion-sensors. This is helpful in Multiplayer mode when you do not want the other team to find out where you are.

- Overcomeing Flood
When you kill any Flood that can come back to life by the infection forms, hit the body and it should break apart. This saves ammunition.

- Easier Legendary mode
If you are playing alone on the Legendary difficulty setting, turn on an idle second player to stay behind. If you die, you will respawn instead of rebegining.

- Stretchy Master Chief in Last Resort multiplayer map
While in Forge mode, move to the two Mongooses next to the building on the far side of the map from the beach. Change into the Monitor, and place six or more Fusion Coils near the side of the bridge coming out of the building. Change back to Master Chief, and stand on top of the coils. Position yourself so that when they detonate you will fly into the side of the bridge. This may require a few attempts. Then, end the game. Go to the theater and watch the movie. Play the explosion slowly by tapping A quickly to pause and rebegin the movie. If done correctly, upon impact Master Chief will stretch out.

- Infinite Spartan laser in Halo mission
Use the following trick to get a Spartan laser with unlimited ammunition in the 'Halo' mission. Play through the level until you meet up with Sergeant Johnson. Shoot him until he falls down and drops the Spartan laser. Quickly pick it up, and shoot it at him. Keep shooting him until he kills you. When you respawn, knock him down again, and pick up his laser. He should get back up with another laser on his back. When he does, shoot him down again, and pick up the new gun he drops. This laser should now have unlimited Spartan ammunition. This makes it easier to destroy the Guilty Spark 343. -From: Camuel

- Leave level boundary in Highground multiplayer map
Go down to the beach area in Forge mode, and get in a Mongoose. Have the person in the Mongoose accelerate at the barrier. Afterwards, have the Wraith boost at the back of the Mongoose from a short distance. For a brief moment the Mongoose will be past the barrier. When this happens, get out. You will then be outside of Highground. This trick works in all ocean maps.

- Leave level boundary in Valhalla multiplayer map
Go to the ocean barrier (the side with the ocean). Then, you and another player must get a Mongoose and Wraith. Have one player drive the Mongoose into the barrier. Keep accelerating, and have the other player get into the Wraith. Drive behind the Mongoose inside the Wraith, and use the boost. You must be close for the Mongoose to go through. Once you hit it, the other player must jump out once he or she is pass the barrier.

- Crossing broken bridge with vehicles in Tsavo Highway mission
When you reach the bridge with a Warthog or other vehicle with barriers, normally you cannot cross this area. However, back in one of the buildings before the bridge is a Grav Lift. Get it, and throw it a bit before the break in the bridge, then run the Warthog or any other vehicle over it. This will make the next area much easier, especially on the Legendary difficulty setting.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

5 Points
Fear the Pink Mist	Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Too Close to the Sun	Destroy an enemy Banshee with the Spartan laser or missile pod in a ranked playlist or in campaign.
We're in for some Chop	Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Used Car Salesman	Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Headshot Honcho	Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
10 Points
Iron	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Cavalier	Realize over 15,000 points in the Campaign meta-game on the third mission.
Catch	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Thunderstorm	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tough Luck	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Demon	Realize over 15,000 points in the Campaign meta-game on the second mission.
Ranger	Realize over 50,000 points in the Campaign meta-game on the sixth mission.
Exterminator	Realize over 15,000 points in the Campaign meta-game on the fifth mission.
Orpheus	Realize over 15,000 points in the Campaign meta-game on the eighth mission.
Askar	Realize over 15,000 points in the Campaign meta-game on the fourth mission.
Vanguard	Realize over 50,000 points in the Campaign meta-game on the seventh mission.
Guerilla	Realize over 15,000 points in the Campaign meta-game on the first mission.
Mythic	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Black Eye	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tilt	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Famine	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Fog	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Reclaimer	Realize over 15,000 points in the Campaign meta-game on the final mission.
20 Points
Landfall	Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
The Road	Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Keep pushedout	Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
30 Points
Cleansing	Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Assault	Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Refuge	Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
40 Points
Marathon Man	Locate and access all Terminals in the Campaign.
The Key	Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Last Stand	Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
50 Points
Return	Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
125 Points
Campaign Finish	Legendary
Campaign Finish	Heroic
Campaign Finish	Normal

25 Points
Ghost Patrol	On Longshore, get 3 kills with a Ghost during any ranked or social match.
Pull	On Citadel, get a Shotgun Spree during any ranked or social match.
Blades of Fury	On Heretic, get a Sword Spree during any ranked or social match.
Heretic Skull	On Heretic, find the hidden skull.
Citadel Skull	On Citadel, find the hidden skull.
Longshore Skull	On Longshore, find the hidden skull.

25 Points
Alas, Poor Yorick	On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Road Rage	On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Flag Dropped	On a Legendary map, get 2 flag carrier kills during any ranked or social match.
Double Double	On a Legendary map, get two Double Kills during any ranked or social match.
50 Points
Defend This	On a Legendary map, get a flag melee kill during any ranked or social match.
Came... From... Behind	On a Legendary map, get 3 assassinations during any ranked or social match.
Look Both Ways	On a Legendary map, get a Splatter Spree during any ranked or social match.

25 Points
Have Fun Respawning	On a Mythic map, get an Extermination during any ranked or social match.
Orbital Skull	On Orbital, find the hidden skull.
...Get the Horns	On a Mythic map, get a Bulltrue medal during any ranked or social match.
Awww, Too Bad	On a Mythic map, get a Killjoy medal during any ranked or social match.
Delicious Brains	On a Mythic map, infect 2 humans during any ranked or social match.
Post Mortem	On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Assembly Skull	On Assembly, find the hidden skull.
Tank Dropper	On any Mythic map, get a kill on another player while in monitor mode.
Sandbox Skull	On Sandbox, find the hidden skull.
Zombie Repeller	On a Mythic map, kill 2 Zombies during any ranked or social match.
Vidmaster Challenge	Brainpan
Hammer Time	On Assembly, get 5 Hammer kills during any ranked or social match.
Save This Film	On a Mythic map, get a Perfection medal during any ranked or social match.
Killtacular	On a Mythic map, get a Killtacular during any ranked or social match.

- Hidden area in Tsavo Highway mission
After the part where you exit your Warthog, jump across the bridge, and kill the Brute and two Grunts that are attacking your men. Turn directly around, facing toward where you came from. Look to your left, and you will see a structure. Go up to the wall on the structure, and look to your right. There should be a pathway. Follow the path until you get on top of a bridge-like structure. There should be some dead UNSC Marines, a sniper rifle, and some other ammunition.

- Melee faster
To melee quicker, press B, then push Y(2), B rapidly.

- Leave level boundary in Isolation multiplayer map
While in Forge mode, get as high as possible as the Monitor. Spawn a teleporter on the ground. Then, hug any wall while still being as high as possible, and spawn another teleporter. If the teleporter beneath you is lit up as it should be, turn back into a Spartan or Elite, then go through the it. You should now be outside the level boundary.

- Play as the Oracle
At the Forge lobby, press Up to turn into the Oracle. You can pick up items by pressing A when you see a green hand.

- Go under map in Construct multiplayer map
To do this trick, you must be in Forge mode. Make sure you sell a respawn point before doing this glitch. Begin out as the Oracle. Go down the pink Grav Lift by using your boost (press LT). There should be a few holes. You cannot fit down these as the Oracle. Begin boosting into one of the holes that is not a closed circle. The Oracle should go slightly lower into this hole. Make sure you keep keep pusheding boost, then turn into either Spartan or Elite. You should fall underneath the level. Make sure you drop a respawn maker on a place where you can stand so you can get back whenever desired. To confirm you are under the level, try to fly up without going through the Grav Lift. There is an invisible wall just like in the 'Foundation' level in Halo 2, except on the bottom. Notice: This may require a few attempts.

- Easy 'Used Car Salesman' achievement
Go to the beginning of 'The Ark' mission. Make sure you have a guest or a friend to help. Continue the mission until you reach where the crashed Pelican is found (after the first terminal). Kill the blue Brute, and grab the rocket launcher under the crashed Pelican. Continue to where the choppers are located. As you are moving, a Prowler will drive by. Ignore it because it will soon stop and abandon the Prowler leading to failure of the achievement. Another Prowler will follow. Have your guest or friend shoot it twice with a Brute Shot, then shoot at it with your rockets to get the achievement. Notice: If you are by yourself, do the same thing, but instead of using a Brute Shot, throw a grenade in front of it. Then, shoot it with the rockets.

- Flipped Elephant message in Sandtrap multiplayer map
Notice: This trick is best done with two players. In the 'Sandtrap' multiplayer map in Forge mode, first try to get as many pre-placed Fusion Coils and Plasma Batteries before begining. Place as many Fusion Coils and Plasma Batteries as possible in front of an Elephant, then drive into the pile. Then, shoot at the pile until it explodes. It will either just jump a little, stand up on the rear, or turn all the way around. When you get close, the message 'Keep pushed RB to flip... wait, what? How did you do that?' will appear. -From: Matthew Garriga


Get two Elephants to collide into each other. Have one flip the other over. When one is flipped over and you get close, the message 'Keep pushed RB to flip... wait, what? How did you do that?' will appear.


Drive the Elephant on a hill so it stays on it. Put exploding crates around the hanger. Blow up the crates with a plasma grenade. When it is flipped over and you get close, the message 'Keep pushed RB to flip... wait, what? How did you do that?' will appear. You can keep flipping it back and forth.

- Multiplayer ranks
Get the indicated number of skill and experience points to advance to the corresponding rank. Notice: You can skip ranks once there is a set skill requirement. For example, you can go from Lieutenant Grade 2 (Skill: 10, EXP: 85) straight to Captain (Skill: 20, EXP: 100)

27. Commander Grade 2	Skill
10. Sergeant Grade 3	Skill
33. Colonel Grade 4	Skill
36. Brigadier Grade 3	Skill
14. Gunnery Sergeant Grade 4	Skill
18. Lieutenant Grade 4	Skill
2. Apprentice	Skill
21. Captain Grade 3	Skill
23. Major Grade 2	Skill
30. Colonel	Skill
21. Captain Grade 4	Skill
7. Corporal Grade 2	Skill
17. Lieutenant Grade 3	Skill
6. Corporal	Skill
12. Gunnery Sergeant Grade 2	Skill
9. Sergeant Grade 2	Skill
1. Recruit	Skill
35. Brigadier Grade 2	Skill
34. Brigadier	Skill
4. Private	Skill
24. Major Grade 3	Skill
8. Sergeant	Skill
32. Colonel Grade 3	Skill
22. Major	Skill
29. Commander Grade 4	Skill
38. General	Skill
40. General Grade 3	Skill
37. Brigadier Grade 4	Skill
20. Captain Grade 2	Skill
31. Colonel Grade 2	Skill
26. Commander	Skill
3. Apprentice Grade 2	Skill
39. General Grade 2	Skill
16. Lieutenant Grade 2	Skill
11. Gunnery Sergeant	Skill
5. Private Grade 2	Skill
15. Lieutenant	Skill
28. Commander Grade 3	Skill
19. Captain	Skill
13. Gunnery Sergeant Grade 3	Skill
25. Major Grade 4	Skill
41. General Grade 4	Skill

- Getting in the same ranked Lone Wolves game
Go to the Xbox 360 Dashboard. Change your language to the second option from the bottom, then begin Halo 3. Invite four other friends that are about the same rank as you, and have them change their language to the same one as you. Get everyone in the same party; everyone must search at the same time. Everyone must then make a game in Lone Wolves. Before you go to begin the countdown, press X to change the search options to the bottom one, which is to search for the same language. If done correctly, you should be in the same ranked Lone Wolves game as your friends. You can now get achievements or level someone up.

- Recon armor (Mythic Map Pack DLC)
Get the three 'Vid Master Challenge' achievements in the 'Mythic Map Pack' bonus DLC to unlock the Recon armor.

- Multiplayer medals
Successfully complete the indicated task in Multiplayer mode to unlock the corresponding medal. Once you unlock most medals, they will be displayed in the corner of the screen and at the end of the match. You can view all earned medals on Bungie's official website. Notice: There are two medals (Linktacular and Steaktacular) which will not display a confirmation once you unlock them, but they will still appear in your medal history.


- Red vs. Blue reference in Crow's Nest mission
When you begin the mission, you will find a large roadway with many Covenant forces. You are supposed to fight your way to a door that will lead you to a room with two turbine-like objects. Instead of going through this door, follow the road all the way to the end, killing all the Covenant on the way. Once you reach the end, there will be a Marine knocking on a door wanting to get in. If you listen closely, you can hear that it is actually an excerpt from Red vs. Blue where Simmons is talking to Griff trying to get into the base. Notice: There is a different message for each difficulty setting:


- Skull locations
You can only collect Skulls on the Normal, Heroic, and Legendary difficulty setting. You must begin from the beginning of the mission. You will not be able to see the Skulls if you load from a checkpoint, unless doing so after dieing. In Co-op mode, as soon as one player picks the Skull up, all players will receive the achievement if there is one. Not all Skulls earn an achievement; only nine of them do. To use Skulls, press X at the lobby screen. This will give you a bonus multiplier for Co-op mode and go towards earning the Guerrilla, Demon, etc. achievements.



The following Skulls require the 'Mythic Map Pack' bonus DLC:


- Reload quicker
If you are a Spartan or Elite and your ammunition is low, press Up again while reloading to instantly reload.

- Hayabusa armor
Acquire the indicated number of Skulls to unlock the corresponding piece of Hayabusa armor:

Hayabusa Helmet	Acquire 13 Skulls
Hayabusa Chest	Acquire 6 Skulls
Hayabusa Shoulders	Acquire 9 Skulls

- Illegal service tags
If you go to 'Appearance' and try to change your service tag to 'I17' (Master Chief's number is 117), the game will not allow it. It will say that the tag is reserved for use by the UNSC.


If you try to use 'A55' as your service tag, you will be told that it cannot be used under UNCS regulations and rules.