Plasma

Plasma is negatively-charged gas, the fourth state of matter, besides solid, liquid, and gas. It is often utilized in superheated form by the technological Covenant for weaponry. It has many applications in the Halo universe, as below:

Starship Weaponry

 * Plasma Torpedo
 * Plasma Turret

Turrets

 * Shade
 * Shielded Plasma Cannon
 * Plasma Cannon

Explosives

 * Plasma Grenade

Firearms

 * Plasma Rifle
 * Plasma Pistol