Plasma

Plasma is the fourth state of matter and is the primary and most common form of ammunition for the Covenant. It can burn through a Marine's ballistic armor and is equally lethal to certain Covenant counterparts. Superheated plasma is found on most all Covenant weapons, like Plasma Rifles, Plasma Pistols, Energy Swords and many others. This ammo type can be found in vehicles, namely Ghosts, on a Spectre, Banshees, Wraiths, and many starships. They are used in turrets, as well. A Plasma Turret, Shade, and Plasma Cannons are just some of the heavy artillery emplacements using plasma.

Starship Weaponry

 * Plasma Torpedo
 * Plasma Turret
 * Plasma Charge

Vehicles

 * Scarab
 * Seraph
 * Banshee
 * Wraith
 * Spectre
 * Phantom
 * Ghost

Weapons

 * Automated Plasma Cannon
 * Plasma Mortar
 * Twin Plasma Cannons

Explosives

 * Plasma Grenade

Firearms

 * Energy Sword
 * Plasma Rifle
 * Plasma Pistol

Turrets

 * Shade
 * Shielded Plasma Cannon
 * Plasma Cannon

Trivia

 * Plasma weapons likely work with a high temperature pilot flame and a high power electro magnet, stripping the plasma out of the flame, and projecting it forward. This trades off the extra damage of fire for the added range and lack of dependence on an atmosphere.
 * For gameplay reasons, plasma is less lethal to unshielded NPCs in the Halo games than in the novels. In the games, marines can take a barrage from a plasma weapon without being incapacitated, but in the books there are several incidences of plasma easily burning through armor and flesh.
 * In the books, it says that plasma torpedoes could rip through the armor of a UNSC ship with one hit. In the games,however, UNSC ships could survive more than that.
 * unlike human weapons. they're good for destroying sheilds of an enemy.

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