Halo 3

New cheats for Halo 3
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Lower Your Weapon [Easter Egg]
In a Local (offline) game, hold these buttons all at once for about 3 seconds to drop your weapon: LB + RB + DOWN (D-Pad) + L3 (click the left stick) + A
Now, go take some pretty screenshots without a weapon in the screen.

Plasma Burnout
If you do not have an Energy Drainer item, the plasma pistol's charged shot can be used to stop vehicles (but doesn't stop vehicle mounted weapons). Pack a plasma pistol when there are vehicles around; it is the next best thing to a rocket launcher.

Scarab Mangling
Having trouble with a Scarab? Or maybe you do not want to get on board (and abandon your bright, shiny Scorpion). Try this strategy instead: on the back of every Scarab, there is a circular glowing spot you can shoot to do damage (it is similar to the glowing spot on the back of Wraiths).
Locate the spot on the Scarab's rear armor that is below its rotating anti-air "ass" (or abdomen) turret. A few shots from Hornet missiles or Scorpion tank shells and the armor will fall off and reveal the critical system you normally need to board to wreck. Don't forget that shooting the Scarab's legs will stop it from turning.

Mythic Map Pack Skulls
Description: These skulls are found in the Mythic Map Pack expansion levels.

Assembly	You can find this on the central tower in Forge
Sandbox	Fly towards the sunset and turn around to find this skull
Orbital	At the place with 2 road blocks where you have to jump, this one is on top of the structure on the right

Bonus Content
How to unlock: If you win the game on Legendary difficulty, you can grab extra content off of Xbox Live, including pictures and a making of video.

Custom Power-up Usage
Custom power-ups can only be used in Custom Games. The custom power-up you can add in the Forge will greatly affect your game depending on how many you have and how fast they respawn. You can only adjust the custom power-up before a match. Be sure to write down what effects you are looking for in a custom game.
Press BLUE to edit the match options in a Custom Game. Go into Weapons and Vehicles, then locate the Custom Power-up Traits.

How to defeat a Scarab
On the back of a Scarab there is a circular glowing area you shoot to do damage. Find this spot on the Scarab's rear armor that is below its rotating anti-air turret. A couple shots from Hornet missiles or Scorpion tank shells and the armor will fall off and reveal the critical system. Plus, shooting the Scarab's legs will stop it from turning.

Katana
Description: The Kantana is a non-usable item that is actually the 4th piece of Hayabusa Armor.
How to unlock the Katana: Get all 13 Skulls in the game and achieve a score of 1,000 (complete all achievements).

Halo 3 Featured
Read all the detail of this HOT game here --> Halo 3

How to stop vehicles
Don't have an Energy Drainer item but need to stop a vehicle? Have no fear just use the plasma pistol's charged shot. *** Does not stop vehicle mounted weapons. So make sure you head off with your handy plasma pistol when there are vehicles around! That is if you do not have a rocket launcher.

Elephant Flipper [Easter Egg]
Description: Get a funny message from in the Forge!
How to: Edit the Sandtrap map and create a Scorpion. You can use the tank to lift and flip the Elephant. The Elephant is the large Sandcrawler vehicle. Once the Elephant is upside down approach it to flip the vehicle. Doing so will award you with a funny message. Try itm it is worth it!

Spartan 117 [Easter Egg]
You will be shown a memorial for the people that died in-game. Spartan 117 is one of those considered KIA but if you wait for the credits to finish, you will see that Spartan 117 is very much alive
***Only applies on Legendary mode.

Hayabusa Armor
Collect the listed number of Skulls to unlock the piece of Hayabusa Armor:

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

Gold Skull Locations

Skull	Locaction	When activated..
Black Eye	Crow's Nest	You will have to battle enemies with melee tactics to regain shield energy
Catch	The Storm	Enemies will throw more grenades
Famine	The Ark	Dropped weapons will hold less ammunition
Fog	Floodgate	The motion tracker disappears
Iron	Sierra 117	You will be sent back to the beginning of the stage you are on when you die instead of to the last checkpoint
Mythic	Halo	All enemies will have twice as much health
Thunderstorm	The Covenant	Enemies will be of a higher rank
Tilt	Cortana	Enemies will become more resilient to your attacks
Tough Luck	Tsavo Highway	Enemies are skilled at getting away from projectiles such as grenades

Spartan Armor Permutations Yoy can unlock the following Spartan armor permutations:

EOD (Body)	Complete Tsavo Highway (on Legendary)
EOD (Head)	Complete the campaign mode (on Legendary)
EOD (Shoulders)	Complete The Ark (on Legendary)
EVA (Body)	Complete Tsavo Highway (on Normal, Heroic, or Legendary)
EVA (Head)	Complete the campaign mode (on Normal)
EVA (Shoulders)	Complete The Ark (on Normal, Heroic, or Legendary)
Mark V (Head)	Get the UNSC Spartan Achievement
ODST (Head)	Get the Spartan Graduate Achievement
Rogue (Head)	Get the Spartan Officer Achievement
Scout (Body)	Get the Too Close to the Sun Achievement
Scout (Head)	Get the Used Car Salesman Achievement
Scout (Shoulders)	Get the We're in for Some Chop Achievement
Security (Head)	Get 1,000 Gamerscore Points
Security (Shoulders)	Get 750 Gamerscore Points

Elite Armor Permutations
Yoy can unlock the following Elite Armor Permutations:

Ascetic (Body)	Get the Up Close and Personal Achievement
Ascetic (Head)	Get the Steppin' Razor Achievement
Ascetic (Shoulders)	Get the Overkill Achievement
Commando (Body)	Get the Triple Kill Achievement
Commando (Head)	Get the Overkill Achievement
Commando (Shoulders)	Get the Killing Frenzy Achivement
Flight (Body)	Complete Tsavo Highway (on Heroic or Legendary)
Flight (Head)	Complete the campaign mode (on Legendary or Heroic)
Flight (Shoulders)	Complete The Ark (on Heroic or Legendary)

List of Achievements

Askar (10 points)	Score over 15,000 points in the Campaign meta-game on the fourth mission
Assault (30 points)	Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary
Black Eye (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Campaign Complete: Heroic (125 points)	Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned)
Campaign Complete: Legendary (125 points)	Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned)
Campaign Complete: Normal (125 points)	Finish the Campaign on Normal
Catch (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Cavalier (10 points)	Score over 15,000 points in the Campaign meta-game on the 3rd mission
Cleansing (30 points)	Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary
Demon (10 points)	Score over 15,000 points in the Campaign meta-game on the 2nd mission
Exterminator (10 points)	Score over 15,000 points in the Campaign meta-game on the fifth mission
Famine (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Fear the Pink Mist (5 points)	Kill 5 enemies with the needler in a ranked free for all playlist or in campaign
Fog (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Graduate (10 points)	Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online)
Guerilla (10 points)	Score over 15,000 points in the Campaign meta-game on the 1st mission
Headshot Honcho (5 points)	Kill 10 enemies with headshots in a ranked free for all playlist or in campaign
Holdout (20 points)	Finish the 2nd mission of the Campaign on Normal, Heroic, or Legendary
Iron (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Killing Frenzy (5 points)	Kill 10 enemies without dying in any ranked free for all playlist (Online)
Landfall (20 points)	Finish the 1st mission of the Campaign on Normal, Heroic, or Legendary
Last Stand (40 points)	Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary
Lee R Wilson Memorial (5 points)	Score 5 grenade sticks in any ranked free for all playlist (Online)
Marathon Man (40 points)	Locate and access all Terminals in the Campaign
Maybe Next Time Buddy (5 points)	Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online)
Mongoose Mowdown (5 points)	Splatter an enemy with the mongoose in a ranked free for all playlist (Online)
MVP (5 points)	Earn the MVP in any ranked playlist (Online)
Mythic (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Orpheus (10 points)	Score over 15,000 points in the Campaign meta-game on the eighth mission
Overkill (5 points)	Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online)
Ranger (10 points)	Score over 15,000 points in the Campaign meta-game on the sixth mission
Reclaimer (10 points)	Score over 15,000 points in the Campaign meta-game on the final mission
Refuge (30 points)	Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary
Return (50 points)	Finish the final mission of the Campaign on Normal, Heroic, or Legendary
Spartan Officer (25 points)	Advance to the Spartan Officer ranks (Online)
Steppin' Razor (5 points)	Score a Triple Kill with the sword in a ranked free for all playlist (Online)
The Key (40 points)	Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary
The Road (20 points)	Finish the 3rd mission of the Campaign on Normal, Heroic, or Legendary
Thunderstorm (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Tilt (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Too Close to the Sun (5 points)	Destroy an enemy Banshee with the Spartan laser or missile pod in a ranked playlist or in campaign
Tough Luck (10 points)	Find and claim this skull when playing on Normal, Heroic or Legendary difficulty
Triple Kill (5 points)	Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online)
Two for One (5 points)	Score a Double Kill with a single Spartan laser shot in a ranked free for all playlist (Online)
UNSC Spartan (15 points)	Earn your Sergeant rating to be recognized as a true Spartan (Online)
Up Close and Personal (5 points)	Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online)
Used Car Salesman (5 points)	Destroy a vehicle that has 3 enemies in it in a ranked playlist or in campaign
Vanguard (10 points)	Score over 15,000 points in the Campaign meta-game on the seventh mission
We're in for some Chop (5 points)	Destroy an enemy vehicle with equipment in a ranked playlist or in campaign

Grunt Birthday Party skull
Effect: Headshots cause enemies to explode.
Mission: Crow's Nest

While in route to the barracks after the 1st objective, you will fall down onto a pipe. At the end of this pipe, look over the edge to see a small space a few feet below you. You must simply drop over and as quicly as you can, pull back to land under the floor you were just on. The skull will be there.

Black-Eye Skull
Effect: Melee hits instantly recharges your shield.
Mission: Crow's Nest

As soon as you begin the Crow's Nest level, head up to the higher level. Go toward the door with the red light, then turn around. Jump onto the racks, onto the red metal light holders, then onto the ventilation tube. The skull will spawn at the end.

Blind Skull
Description: "Shoot from the hip"
Stage: First Stage

When you get to the area where one of the marines points out the Phantom overhead, jump over the rocks and keep following the path on the right. When you get to the cliff there will be a rock over of the side. The skull is on the end of the rock.
*** This skull has to be Activated before you start a Campaign map.

Iron Skull
Effect: When either player dies in Co-Op on any difficulty both players will restart at last check point.
Mission: Sierra 117

Behind the prison cell where you rescue Sarge is a large ledge. Head to the far right side and jump on the boxes, then onto the pipes to get up on the ledge, goto the far end of the ledge, turning 2 corners the skull is at the far end.

Tough Luck Skull
Effect: Enemies do saving throws
Mission: Tsavo Highway

This skull can be found about halfway through the Tsavo Highway mission. Right after you are forced to walk through a large blue barrier, you will come out of a tunnel on the highway and see a large pipeline on your left. Drop down in between the two, and run to the wall in front. Follow the wall all the way to where it connects with the cliff on your right, and turn to the left. There will be a few ledges so crouch jump from ledge to ledge, and the last one will have the Tough Luck skull on it.

Mythic Skull
Effect: Every enemy on the field now has double their normal amount of health.
Mission: Halo

As soon as the Halo mission starts walk up the hill in front of you and into the cave. Hug the right side of the cave and after a large boulder you will see a path on your right, just take the short path and it will be at the end.

Cowbell Skull
Effect: Explosive force increased (sputnik from H2)
Level: The Ark

Near where you fight the scarab. pick up a grav lift from the small building. Now continue until you reach the 2nd sloping hallway. You will see some platforms halfway down. The skull is on the top level. Toss the grav-lift on the right side of the hall so it lands on the fourth little green dot from the door. Then run, jump, and use the grav-lift to propel you to the top. You should reach a ckeckpoint just as you enter the room so it you miss just try again.

Thunderstorm Skull
Effect: Upgrades enemies to their stronger versions.
Mission: The Covenant
Description: "Field promotions for everyone!"

Fly to tower 2. This is after you shut down tower 1 and get access to the hornet. While walking up the stairs, go to the middle part that connects both and there should be a stair leading up to a platform where the skull is.

Fog Skull
Mission: Floodgate
Effect: Your motion sensor disappears.
Description: "You’ll miss those eyes in the back of your head."

As you are walking down from the anti-air gun you destroyed in the previous mission, you encounter a ramp by the missile launcher. Padt this ramp, you find a checkpoint. You will hear a marine yelling, "There! Over There". Look up and to the right, directly at the roof of the building next to the missle launcher. There is a single flood form (not to be mistaken with the 2 other flood forms jumping in front of you) which is holding the skull. Kill him before he jumps, and he will drop the skull down to the ground where you can retrieve it. Too early, and the skull will get stuck on the roof though, so just time it carefully.

Famine Skull
Effect: Dropped weapons will have very little ammo compared to normal.
Mission: The Ark
Description: "Trust us. Bring a magazine."

When you 1st go into the valley to the right after the wrecked phantom, look to your left where you will see a very large boulder. Use a ghost and get to the side of the boulder that is closest to the bridge overhead. It is easy to pilot the ghost up the side of the wall using the thrust. To get the skull, pilot 2 ghosts up the wall to the top of the bridge and stack them one on top of another next to the beam where the skull is placed. Simply jump from the top of the ghosts towards the skull and land on the beam.

Tilt Skull
Effect: Enemies have different body parts that may be resistance to certain bullet types
Mission: Cortana
Description: "What was once resistant is now immunity"

When in the circular room with all the flood, look for a small structure next to 2 archways. Jump on top if the small structure and up on the rocks to the top left, turn left and jump up again, then do a 180 and jump to the rocks across from you. After that follow the the rock sticking out and leading up on top of of the original circular room, the skull will be in there in a pile of blood.