Armor Permutations

Armor Permutations are a feature in Halo 3, Halo 3: ODST, and Halo: Reach that enable players to customize their multiplayer character's armor to their liking. In Halo 3, this feature allows players to change the helmet, shoulder, and chest pieces worn by their multiplayer character. In Halo 3: ODST, players can choose between the preset armor of their squad members, and can toggle whether or not their character wears a helmet, though this will not affect health. In Halo: Reach, players can purchase different armor from The Armory, which also includes wrist armor, knee guards, utilities, visor colors, shoulder armor and armor effects. Players who purchase Helmets in Halo Reach are also given the option of adding accessories to their helmets for cosmetic appearance. Players also have the option of choosing between being a Spartan or Elite in Halo 2 and Halo 3, and can set a preference for either in Halo: Reach.

SPARTAN Armor Permutations
There is a wide variety of SPARTAN-II armor permutations in Halo 3. There are eleven helmets, eight shoulder pieces, and eight chest pieces, for a total of 5,632 different SPARTAN-II armor permutation possibilities: one helmet, two shoulder pieces, and one chest piece per permutation, not including the Recon Armor chest piece. It should be noted the Rogue, Mark V, and ODST armor have only helmet pieces, and Security Armor has both helmet and shoulder pieces but no chest permutation. Your customized armor permutation is not shown in Campaign.

Elite Armor Permutations
There is a wide variety of Elite armor permutations with five helmets, five shoulder pieces, and five chest pieces for a total of 625 different Elite armor permutations with one helmet, two shoulder pieces, and one chest piece per permutation.

ODST Permutations
Halo 3: ODST features armor customization, though it is not as complex as Halo 3 ' s. One can play as each member of the squad having their own unique aesthetic armor. Players can choose primary and secondary armor colors, but the armor's main color remains the same (dark gray). Players can also choose whether or not to wear a helmet, unless they are playing as the Rookie or Sergeant Johnson, who cannot remove his helmet and cannot put one on, respectively. Choosing not to wear a helmet does not affect gameplay. Without a helmet, the player still has the same health and stamina, and they can still use VISR mode.

Characters

 * Rookie: Unlocked by default.
 * Dare: Complete the Campaign on Legendary.
 * Buck: Unlock the Tayari Plaza Achievement.
 * Dutch: Unlock the Uplift Reserve Achievement.
 * Romeo: Unlock the NMPD HQ Achievement.
 * Mickey: Unlock the Kizingo Boulevard Achievement.
 * Sergeant Johnson: Came with the pre-order of Halo 3: ODST.

The Armory (Halo: Reach Permutations)
Player customization returns in Halo: Reach, but with far deeper customization options than Halo 3. In Halo 3, unlocking armor permutations involved getting a certain Achievement, or a group of achievements. In Halo: Reach, armor is acquired by purchasing it with "credits" (cR) in The Armory, although some armor permutations may have to be unlocked through Halo: Reach's Achievements, previous purchases, or by reaching a certain rank. Credits are earned by winning or finishing games in Campaign, Matchmaking, Firefight, and Forge, or by completing Achievements, getting Commendations, or completing daily and weekly challenges.

In Halo: Reach, there are ten available slots for Spartan armor customization. The ten available slots customizable to Spartans feature the Helmet, Left and Right Shoulder, and the Chest piece, returning from Halo 3. The six new slots for customization include Wrist, Utility, Visor Color, Knee Guards, Armor Effect, and Firefight Voice. In addition, the player's helmet can be "upgraded" with various gadgets, known as Helmet Variants. The player will also be able to choose their character's gender, but unlike Halo 3, the Spartan's gender will also be reflected in their body type, instead of just their voice. Additionally, the player's character will also appear in Campaign mode, as Noble Six.

In Halo: Reach, players are no longer be able to use Elites as their default player model in Matchmaking, likely for balancing reasons. Instead, Elites are used in Matchmaking for the new Spartan-vs-Elite gametypes, and will still be able to use Elites in Custom Games, through a "Preferred Species" setting. Elite armor customization in Halo: Reach has been downgraded from Halo 3 to a complete model swap. Elite armor does not cost additional cR, but instead requires the player to reach a certain rank for certain armor; for example, to obtain the armor of an Ultra Elite, the player must reach the rank of Warrant Officer.

Additionally, the Limited and Legendary Editions of Reach include exclusive armor permutations/effects for your player character. The Limited Edition comes with the "Sangheili Officer" Elite permutation, while the Legendary Edition includes the aforementioned permutation, along with a Spartan "Flaming Head" effect. A redeemable token that gives the player access to the Recon Helmet is bundled with the game to all sales made on the release date, and with all pre-orders outside of North America. However, if the player is equipped with the exclusive flaming helmet effect, the flames will be visible during gameplay but will not be shown in cinematics. As with Halo 3, every armor permutation in Halo: Reach is purely for aesthetic purposes and do not impact gameplay whatsoever.

The last two sets of helmets for Halo: Reach are available through Halo Waypoint only. Using Waypoint will show you how to unlock said armor pieces, which each have a base and two additional styles. The unlocks are linked to overall Halo Career Milestones (linked to universal Halo Gamerscore) and specialist achievements throughout the Halo game. For example: the Military Police helmet requires the user to have completed Halo: Reach on Normal Difficulty, Stage two of the helmet requires the user to have the A Spoonful of Blamite achievement and Halo 3 Fear the Pink Mist achievement (accompanied by the right Career Milestone award and the base helmet variant).

SPARTAN
Inheritor* - Must have purchased all helmet bases.
 * ** - Must meet the criteria stated on Halo Waypoint.

Trivia

 * There was originally going to be an Arbiter Armor Permutation in Halo 3, but it was taken out before the game ' s release. Bungie, however, did not explain why. Many fans expected it to be released as DLC, but this never happened.
 * In Halo 3, the neck of an Elite (regardless what Armor Permutation used) is completely immune to any form of damage except for a shot from a charged Plasma Pistol. In addition, the projectile will simply pass through the neck, as though the neck wasn't there, without a blood spatter. This is because both Elites and Spartans have different models but the same hit boxes.
 * Each Elite also has a modified neck, either sleek black or a different model such as scale-like plating at the back of the neck.
 * The armor in Halo 3 was originally planned to be more detailed, with dents, bullet holes and other details in the armor, but this detail was never implemented.
 * For Halo: Reach, Seven pieces of exclusive Spartan armor are available on Halo Waypoint by earning achievements from Halo 3, Halo 3 ODST and Halo: Reach itself. An eighth one was a pre-order bonus from Gamestop and EB Games (Australia).
 * In the October 15 Bungie Weekly Update, Bungie confirmed that once the Halo: Reach community completed 117 Million Daily & Weekly challenges, there would be more armor pieces to unlock in the armory and the Lt. Colonel rank cap would be lifted.
 * In Halo: Reach, any shoulder pads equipped on Spartan players are not visible in first person view. The base shoulder pads are seen instead of what is equipped and the FJ/PARA pauldron can be seen on the right arm if the player has a chest piece that comes with a prosthetic arm. This can be more easily seen if you go into theater mode and pause during a first-person melee animation that shows where the pauldron would be on the spartan (Such as a lunge with the Energy Sword). The reason for this could be to prevent player's vision from being restricted due to over-sized shoulder pads.
 * The description of the black visor in Halo: Reach states "You can have it in any color you want... as long as it's black." This is a reference to a quote supposedly made by Henry Ford, speaking about the Ford Model T in 1909.
 * The description of the silver visor in Halo: Reach states "Jumping feet first into hell isn't your job; making sure it's crowded when you get there is." This is an obvious reference to Orbital Drop Shock Troopers. Though the blue visor looks more like the visor ODST's sport.
 * The description of the HP/PARAFOIL [R] in Halo: Reach states "Make sure to remember on your next jump that it's FEET first into hell." This is yet another obvious reference to Orbital Drop Shock Troopers,
 * In Halo: Reach, as of 11/10/2010, players require 9,979,450 cR to gain 100% armory completion, with all armor pieces, firefight voices, visor colors and armor effects. This means that players will be unable to obtain 100% armory completion until 60% into the rank of Eclipse, or higher in the event of yet more armor being released.
 * It was seen in a Defiant map pack photo that one player was wearing a new helmet. The armor was not included in the map pack, nor did it ship in the original game, but it is confirmed that 343 and Bungie both have the helmet. It is also confirmed, though indirectly, that Armor DLC is possible. The GRD Doll is a possible reference to this.
 * In the same photo, the player with the unknown helmet is also wearing a likewise unknown new chest piece.
 * Bungie has released an application for iPod, iPhone and IPad so players who download the app could get Eternal armor effect and two nameplates. The two nameplates are All-stars and Bungie. The Eternal armor effect is no longer available, but the app still gives the user the nameplates.
 * The unknown helmet in the Defiant map pack Trailer appears to be similar to the EOD module. It also has similarities to the CNM-1 attachment for the HAZOP helmet.