Halo 3 Cheats

Multiplayer Medals
If you do the following things you will get the medal while playing multiplayer. When you do the task usually it will show you by a little icon of the said medal appearing in the corner of the screen. Also at the end of each match you can check what medals you got. You can also check your overall medal count on bungie's official website. A very small amount of these are secret medals in that they don't tell you right when you get them but they will appear in your medal history. (One example of such a medal is the Steaktacular! Medal)

Assassin! Hit and kill an opponent with a melee attack from behind.
Beat Down! Hit and kill an opponent with a melee attack.
Bomb Planted! Plant the bomb in a Assault Gametype.
Bulltrue! Kill an opponent who is in the act of a sword lunge.
Death from the Grave! Kill an opponent after you have died.
Double Kill! Kill 2 opponents within 4 seconds of each other.
Extermination! Get an overkill on the opposing team, wiping out all of the members.
Flag Kill! Get a melee kill with the flag in a CTF gametype.
Flag Score! Capture the opposing team's flag in a CTF gametype.
Grenade Stick! Kill an opponent by sticking him/her with a Plasma Grenade or a Spike Grenade.
Hail to the King! Kill 5 consecutive opponents in a single life from inside the hill before it moves in a King of the Hill gametype.
Hell's Janitor! Kill 10 zombies in a row as a human without dying in an Infection gametype.
Highjacker! Board an enemy ground vehicle.
Incineration! Kill an opponent by using the Flamethrower.
Infection Spree! Kill 5 humans in a row as a zombie without dying in an Infection gametype.
Invincible! Kill 30 opponents in a row without dying.
Juggernaut Spree! Kill 5 consecutive opponents in a single run as the Juggernaut in a Juggernaut gametype.
Killapocalypse! Kill 9 opponents within 4 seconds of each other.
Killed Bomb Carrier! Kill the opposing bomb carrier in a Assault Gamtype.
Killed Flag Carrier! Kill the opposing flag carrier in a CTF gametype.
Killed Juggernaut! Kill the Juggernaut in a Juggernaut gametype.
Killed VIP! Kill the opposing VIP in a VIP Gametype.
Killimanjaro! Kill 7 opponents within 4 seconds of each other.
Killing Frenzy! Kill 10 opponents in a row without dying.
Killing Spree! Kill 5 opponents in a row without dying.
Killionaire! Kill 10 opponents within 4 seconds of each other.
Killjoy! End an opponent's killing spree—any spree.
Killtacular! Kill 5 opponents within 4 seconds of each other.
Killtastrophe! Kill 8 opponents within 4 seconds of each other.
Killtrocity! Kill 6 opponents within 4 seconds of each other.
Laser Kill! Kill an opponent by using the Spartan Laser.
Last Man Standing! Be the last human of the game in an Infection gametype.
Linktacular! Play in a matchmade game comprised of all Bungie.net users. (Secret Medal)
Mmmm Brains! Kill 10 humans in a row as a zombie without dying in an Infection gametype.
Oddball Kill! Get a melee kill when holding the ball in a Oddball gametype.
Open Season! Gun down 10 opponents with a Shotgun in a row without dying.
Overkill! Kill 4 opponents within 4 seconds of each other.
Perfection! Win a slayer game with 15+ kills without dying.
Rampage! Kill 20 opponents in a row without dying.
Running Riot Kill 15 opponents in a row without dying.
Sharpshooter! Snipe 10 opponents in a row without dying.
Shotgun Spree! Gun down 5 opponents with a Shotgun in a row without dying.
Skyjacker! Board an enemy aircraft.
Slice 'N Dice! Cut down 10 opponents with the Plasma Sword in a row without dying.
Sniper Kill! Kill an opponent by using a sniping weapon.
Sniper Spree! Snipe 5 opponents in a row without dying.
Splatter Spree! Splatter 5 opponents in a row without dying.
Splatter! Hit and kill an opponent with a vehicle.
Steaktacular! Beat the opposing team by over 20 kills; (Luke owes you a steak dinner) (Secret Medal)
Sword Spree! Cut down 5 opponents with the Plasma Sword in a row without dying.
Triple Kill! Kill 3 opponents within 4 seconds of each other.
Unstoppable! Kill 10 consecutive opponents in a single run as the Juggernaut in a Juggernaut gametype.
Untouchable! Kill 25 opponents in a row without dying.
Vehicular Manslaughter! Splatter 10 opponents in a row without dying.
Wheelman! Be the driver of a vehicle when a passenger kills an opponent.
Zombie Killing Spree! Kill 5 zombies in a row as a human without dying in an Infection gametype.

Hayabusa Armor
Collect the hidden skulls throughout the game to unlock the pieces of Hayabusa armor.

Hayabusa Chest: Collect 6 hidden skulls
Hayabusa Helmet: Collect 13 hidden skulls
Hayabusa Shoulders: Collect 9 hidden skulls

Armor Permutations
Elite:
Ascetic Body: Unlock "Up Close and Personal" Achievement
Ascetic Head: Unlock "Steppin' Razor" Achievment
Ascetic Shoulders: Unlock "Overkill" Achievment
Commando Body: Unlock "Triple Kill" Achievement
Commando Head: Unlock "Overkill" Achievment
Commando Shoulders: Unlock "Killing Frenzy" Achievment
Flight Body: Complete Tsavo Highway On Herioic or Legendary
Flight Head: Complete Campaign mode on Heroic difficulty.
Flight Shoulders: Complete The Ark on Heroic difficulty or higher.

Spartan:
EOD Body: Complete Tsavo Highway on Legendary
EOD Head: Complete Campaign mode on Legendary Difficulty
EOD Shoulders: Complete The Ark on Legendary difficulty
EVA Body: Complete Tsavo Highway on Normal or higher
EVA Head: Complete Campaign mode on Normal
EVA Shoulders: Complete The Ark on Normal difficulty or higher.
Mark V Head: Unlock "UNSC Spartan" Achievment
ODST Head: Unlock "Spartan Graduate" Achievment
Rogue Head: Unlock "Spartan Officer" Achievment
Scout Body: Unlock "Too Close to the Sun" Achievement
Scout Head: Unlock "Used Car Salesman" Achievment
Scout Shoulders: Unlock "We're in for Some Chop" Achievment
Security Head: Earn 1000 Gamerscore points.
Security Shoulders: Earn 250 Gamerscore points.

Hint: Skulls:
You can only claim/collect the skulls under the Normal, Heroic or Legendary difficulty settings. You must start from the beginning of the mission. You will not be able to see the skulls if you load from a checkpoint. In Co-op mode, as soon as one player picks the skull up, all players will receive the achievement. Not all skulls earn an achievement; only nine of them do so. To use skulls, press X at the lobby screen. This will give you a bonus multiplier for co-op and go towards earning the Guerrilla, Demon, etc. achievements.

Black Eye Skull: From the start of the "Crow's Nest" mission, without moving anything, you can see a massive pipe above you. Walk up the stairs, then up the next set. Turn to your left and jump up on the shelf unit. From there, jump to the red cross beam then up onto the pipe. From there, just walk to the end. Walk over the Black Eye Skull to claim it. You do not have to pick this skull up, it does it automatically. Its description reads "Bash your way to better health." Your shield will not auto-recharge anymore, and you must kill an enemy with a melee attack.

Iron Skull: After freeing Johnson and killing all the Covenant that come in the Phantoms in the "Sierra 117" mission, walk to the Pelican that arrives to pick you up. Face the cargo bay, but instead of hopping in turn left and follow the path. Once you hit the wall, jump up to your right to eventually reach a walkway. Walk all the way to the end. Take a left, then a right. At the end of this a little bit to the right is a dark corner. Press Up to turn your light on and you should see the skull. If you cannot see it you are probably standing on it. Its description reads "Death carries a heavy price...". Instead of only losing 25 points when you die, you will lose 75.

Mythic Skull: Follow the normal path in the "Halo" mission until you reach a cave. Hug the right wall until it branches off into a small path. At the end of this path is some rubble, and in front is the skull. Its description reads "Coverage under the Covenant health plan." It gives a 3x score multiplier for all kills.

Blind Skull: When you get to the area where you see the Phantom overhead (one of the marines will point it out) 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. Note: This skull has to be Activated before you start a Campaign map.

Famine Skull: Mission: The Ark. When you first go into the valley to the right after the wrecked phantom, look to your left where you will see a huge 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.

Fog Skull: Mission: Floodgate. As you are walking down from the anti-air gun you destroyed in the previous mission, you encounter a ramp (next to a missile launcher). Around this ramp, you hit a checkpoint. At this point, you should also 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 two 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.

Grunt Birthday Party skull: How to find: Right after the first objective, while en route to the barracks, 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. After that, the skull will be at the end.

Catch Skull: Mission: The Storm. You can get this by performing a grenade jump off a warthog, or grab a ghost and go back to the ramp from which you first came out, using the ghost to push a big square crate back over to the front of the silo pod that the skull is on top of, then use the box as a place to jump from.

Tilt Skull: Mission: Cortana. When in the circular type room with all the flood look for a small structure piece next to two archways, jump on top if it 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 a pile of blood.

Tough Luck Skull: On Tsavo Highway, about halfway through the 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 of you. Follow the wall all the way to where it connects with the cliff on your right, and turn to the left. There should be a few ledges--simply crouch jump from ledge to ledge, and the last one should have the "Tough Luck" skull on it.

Catch Skull: From the start of The Storm level, go through until you go outside again. When you go outside look straight across there is a small round building straight out there, the skull is on top. In order to get up there you can either use a warthog as a platform or grenade-jump. DO NOT destroy the wraith near the door or the skull will disappear.

Cowbell Skull: Level: The Ark Location: First pick up a grav lift from the small building near where you fight the scarab. Now proceed through the level until you reach the second sloping hallway (stairway), you should see some partitioned risers (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: Mission: The Covenant. After you shut down tower 1 and get access to the hornet, fly to tower 2 (the one the arbiter shut down). 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.

IWHBYD Skull: Mission: The Covenant. To get this, get to the room where you "fight" the Prophet of Truth. Let the Arbiter kill him, turn around, and kill all the Flood here as well; makes it a LOT easier. With all obstacles out of the way, you need to jump through the Halo holograms here in a specific order: 4 5 6 5 7 6 5 4 1 2 3 2 7 2 1 3 4 6 7 5 4 6 5 4 5 3 4. When you jump through the final hologram, they all light up in a sequential pattern. The Skull will be at the end waiting for you right before the energy bridge leading to Truth's corpse.

Katana
Katana is unlocked when you complete all Achievements (1000/1000) and find all skulls.

The 7 Terminals
The Ark:
1. Start the mission and once you enter the first building take a left into another door and now you should be in a curved corridor. On the inside is a Terminal.
2. After activating the bridge to let your comrades accross the gap, do a 180 and you should see it. (it does not open until you activate the bridge)
3. In the third building after defeating the scarab, kill the group of sleeping covenant, then follow the corridor downwards. Once you reach a door in front that is locked, immediately on the left there's an open door. Go through and walk straight off, then do a 180 to find a secret room. It is in there.

The Covenant:
1. When in the first tower standing on the lift, face the access panel and turn left. Jump over and it's right there.
2. Land your hornet on the second tower, walk towards the entrance but when you see the locked door, do a 180. Should be right in front of you.
3. When in the third tower standing on the lift, face the access panel and turn right. Jump over and it's right there.

Halo:
1. After reaching the end of the first cave, hug the right wall and you will see a building. Jump up onto the walkway and hang a left once inside. It's right there.

Multiplayer Ranks
This is a list of the Skill and Experience needed to advance in rank. You can skip ranks once there is a set skill requirement.

01 Recruit Skill Needed: 0 EXP:1
02 Apprentice Skill Needed: 0 EXP:2
03 Apprentice Grade 2 Skill Needed: 0 EXP:3
04 Private Skill Needed: 0 EXP:5
05 Private Grade 2 Skill Needed: 0 EXP:7
06 Corporal Skill Needed: 0 EXP:10
07 Corporal Grade 2 Skill Needed: 0 EXP:15
08 Sergeant Skill Needed: 0 EXP:20
09 Sergeant Grade 2 Skill Needed: 0 EXP:30
10 Sergeant Grade 3 Skill Needed: 0 EXP:40
11 Gunnery Sergeant Skill Needed: 0 EXP:50
12 Gunnery Sergeant Grade 2 Skill Needed: 0 EXP:60
13 Gunnery Sergeant Grade 3 Skill Needed: 0 EXP:150
14 Gunnery Sergeant Grade 4 Skill Needed: 0 EXP:300
15 Lieutenant Skill Needed: 10 EXP:70
16 Lieutenant Grade 2 Skill Needed: 10 EXP:85
17 Lieutenant Grade 3 Skill Needed: 10 EXP:200
18 Lieutenant Grade 4 Skill Needed: 10 EXP:400
19 Captain Skill Needed: 20 EXP:100
20 Captain Grade 2 Skill Needed: 20 EXP:150
21 Captain Grade 3 Skill Needed: 20 EXP:300
21 Captain Grade 4 Skill Needed: 20 EXP:600
22 Major Skill Needed: 30 EXP:200
23 Major Grade 2 Skill Needed: 30 EXP:300
24 Major Grade 3 Skill Needed: 30 EXP:600
25 Major Grade 4 Skill Needed: 30 EXP:1,200
26 Commander Skill Needed: 35 EXP:300
27 Commander Grade 2 Skill Needed: 35 EXP:450
28 Commander Grade 3 Skill Needed: 35 EXP:900
29 Commander Grade 4 Skill Needed: 35 EXP:1,800
30 Colonel Skill Needed: 40 EXP:400
31 Colonel Grade 2 Skill Needed: 40 EXP:600
32 Colonel Grade 3 Skill Needed: 40 EXP:1,200
33 Colonel Grade 4 Skill Needed: 40 EXP:1,800
34 Brigadier Skill Needed: 45 EXP:500
35 Brigadier Grade 2 Skill Needed: 45 EXP:1,000
36 Brigadier Grade 3 Skill Needed: 45 EXP:2,000
37 Brigadier Grade 4 Skill Needed: 45 EXP:4,000
38 General Skill Needed: 50 EXP:600
39 General Grade 2 Skill Needed: 50 EXP:1,200
40 General Grade 3 Skill Needed: 50 EXP:2,500
41 General Grade 4 Skill Needed: 50 EXP:5,000