Sangheili/Gameplay

Weapon Compatibility
Although Elites are most commonly seen with Energy Swords, Covenant Carbines, Plasma Rifles and Needlers, because of their strength and versatility on the battlefield, Elites can utilize any weapon in the field of battle, Human or Covenant, though most Elites would rather die than use a Human or Jiralhanae-oriented weapon. Lieutenant Junior Grade Fred-104 theorizes that the Elites follow an edict of the Prophets that states that they should not use Human weapons, based on his own sightings of Elites happily dying rather than pick up a fully loaded MA5B Assault Rifle at their feet. The Brutes however do not behave in a similar manner, even attempting to steal FENRIS nuclear warheads during the Battle of Earth. The Arbiter, it appears, has no particular objection to sullying his already fraudulent honor with a Human weapon. Most other Elites will use a Human or a Brute weapon if it is given to them by the Arbiter, although usually with a derogatory remark (with the exception of the Spartan Laser), such as, "Bah! Even as trophies, these weapons are worthless!", or even "Worthless piece of crap!" However, in the hands of an Elite, any Human weapon can be deadly. Elites can hold a Rocket Launcher with one hand due to their superior strength, unlike normal Marines or even Spartan IIs. They will also use Human vehicles such as a Mongoose, or a Warthog. Their marksmanship is easily comparable to a skilled Marine, and thanks to their armor and increased musculature they can survive attacks that would kill a normal human soldier, even with their personal shields down. In Halo 2 it is known that on the level Metropolis if left alone, the Elites will kill Sergeant Stacker in the Gauss Warthog, take control of the Gauss cannon, and start firing at you.

Combat
Despite their advantages, Elites also have some vulnerabilities:

Changes
Due to the constant upgrading of the Halo series from the Xbox to the Xbox 360 below shows a list of changes to the Sangheili species from each Halo game.

Halo E3 2000 Trailer to Halo: Combat Evolved

 * The more conventional jaw in the trailer was separated into two mandibles.
 * They have wider waists.
 * Their legs are less bulky.
 * Their eyes have been moved more to the sides of their heads.

Changes from Halo: Combat Evolved to Halo 2

 * Sangheili are hunched over more to facilitate multiplayer use.
 * First Sangheili allies encountered.
 * The Elites speak English instead of their native tongue.
 * Zealot Sangheili ranked enemies are now only encountered on Legendary difficulty, rather than all difficulties. They no longer possess Overshields (having shielding equal to that of a red Elite Major), and are armed exclusively with Plasma Swords.
 * Stealth Sangheili now have gray colored armor, rather than light blue, and also have a Minor (gray) and Major (brown) ranking system. They can also be detected by the motion tracker when invisible. Additionally, they sport energy shields which was absent from Halo: CE.
 * Their melee attacks do more damage, and can kill in one hit on the Normal difficulty or above in the campaign.
 * Elites fire in much longer bursts in Halo 2, firing several plasma rifle rounds per burst, compared to just 3 or 4 shots per burst in Halo: Combat Evolved.
 * Ranger ranks are introduced.
 * Gain an animation to appear startled upon seeing the Master Chief.
 * Mandibles and facial features are more defined.
 * Gain the ability to hijack vehicles.
 * Elites no longer have the occasional "spade" helmet and no longer wear a Forerunner symbol on their backs, in campaign. However, they can be present using the emblem feature for multiplayer.
 * Elites can be seen now dual-wielding weapons.
 * Elites now have secondary colors in both campaign and multi-player.
 * Regulars now wield Energy Swords as well, instead of just the Zealots.
 * Elites gain an animation for when they pull out an Energy Sword that makes them roar, though they don't make the sound in Multiplayer.
 * Instead of having different shielding strengths for different Elite classes, the majority of Elite classes now having the same level of shield strength (Elite Majors, Spec Ops Elites, Honor Guard Elites, and Zealots all possess identical levels of shielding). The exceptions are Stealth Elites, Elite Minors and Ranger Elites, Elite Ultras and Councilor Elites.
 * Elites are somewhat more vulnerable without their shielding, and most Elite classes can only survive as much damage as a basic Grunt or Jackal after their shields are disabled (this is in contrast to Halo: CE, where Elites had more than twice as much health as a Grunt or Jackal even without their shields). The exceptions are the Stealth Elites (who have about twice as much health as standard Elite classes) and the Ultra Elites (who have about 3 times as much health as a standard Elite).

Changes from Halo 2 to Halo 3 and Halo 3: ODST

 * Darker skin and eyebrow ridges, although no hair on ridges. Has a shiny, "scaly", texture on the neck.
 * They have a 'bulkier' appearance.
 * Varying eye color between some individuals, mostly orange.
 * Ranger, Ultra, Zealot, Honor Guard, Councilor, and Stealth ranks are never encountered during gameplay, although several corpses of dead Ultras can be seen in Floodgate and Cortana.
 * Wider variety of armors to choose from in multiplayer.
 * Runs into melee regardless of what the enemies are armed with. This also results in a high chance on team killing among them.
 * The Elites, even more so with the Catch skull on, toss Plasma Grenades with reckless abandon, and many players have reported to be "team stuck" by the Elites.
 * As with other Covenant races, the Elites have received minor aesthetic changes, mostly in their armor. In Halo: CE and Halo 2, the pauldrons on the armor resembled a more pronounced version of the MJOLNIR pauldrons, where as in Halo 3 the pauldrons are much thicker and appear overlapped. The "Combat" helmet also has shorter side fins, and more spikes added to the back. The "fins" on the gauntlets have also been removed, as well as the orange crystals on the arms and legs, and their leg armour flares out at the bottom instead of being tight, revealing what appears to be the heel of it's foot. However, this leads to clipping, as Halo 3 largely uses old Halo 2 animations.
 * Minors and Majors have varied armor. This meaning that a Minor may be light blue, and another may be dark blue. Same goes for the Majors (with lighter and darker reds).
 * All Elite armor has Forerunner glyphs, as well as multiple Marks of Shame adorning the body and shoulders.
 * The roaring animation for pulling out the sword is changed so that it only appears when lunging at an opponent while crouched.
 * Minors and Majors are seen holstering an Energy sword as a secondary weapon, which is usually never allowed for the lower ranks.
 * Spec Ops Elites can be seen wearing Assault Harnesses in Floodgate. All other Elites in Halo 3 wear the familiar standard Combat Harnesses. The corpses of dead Elites seen in Halo: ODST can be found wearing a variety of different armor permutations.

Changes from Halo 3 to Halo Wars

 * They are seen dual-wielding Energy Swords in the trailers, but only the Arbiter does so in game.
 * They seem to be more muscular in the chest, and have thinner waists than in any of the other Halo games. Additionally, they appear to have nail-like claws.
 * In-game the only visible difference in rank is the Arbiter and Honor Guards, as well as the Red Elites wielding Energy Staves, all others are purple.
 * Their teeth are in different positions, such as having teeth on the inside of their mandibles, as well as having teeth behind and to the center.

Changes from Halo 3 to Halo: Reach

 * Returning the tradition from Halo: Combat Evolved, Elites once again speak in their native language. This is part of an attempt to make the Covenant more alien and imposing.
 * The Elite Minor featured in the Halo: Reach Video Games Awards Trailer sported shoulder pads and gauntlets similar to those of the Minors from Halo: Combat Evolved and Halo 2.
 * They seem to appear more animalistic than their Halo 2 and Halo 3 counterparts.
 * They appear to have more teeth on both their upper jaw and mandibles which seem to be sharper and longer like the Halo Wars Elites.
 * Their eyes do not appear to have pupils (although this may be caused by the lighting) and look as though they have been moved closer to the front of their heads.
 * Elites are no longer hunched over, making them appear taller and more imposing. This additional height may hint that Elites are no longer usable in multiplayer.
 * It appears that at least Ultra ranked Elites are making a comeback. Additional ranks may also return.