Plasma cannon

Plasma cannon or plasma turret refers to a number of different weapon systems:

Ground weapons

 * Class-1 directed energy cannon - a general category of manned automatic plasma turrets. Also mounted on many Covenant vehicles.
 * - a Covenant heavy support weapon seen exclusively in Halo 2 and Halo 2: Anniversary.
 * - the Covenant's standard portable plasma turret in Halo 3, Halo 3: ODST, Halo: Reach and Halo 4.
 * - Covenant portable plasma turret in Halo 5: Guardians.
 * Class-2 directed energy cannon - weapons mounted on many Covenant vehicles.
 * Heavy plasma cannon - a class of heavy weapons mounted on many Covenant dropships and vehicles.
 * Shade - The Covenant's main stationary defense plasma turrets.
 * - the variant seen in Halo 3, Halo 3: ODST, Halo: Reach, and Halo 5: Guardians.
 * Type-27 Anti-Infantry Stationary Gun - the variant seen in Halo 2.
 * - the variant seen in Halo: Combat Evolved.
 * - the variant seen in Halo 4.
 * - an anti-aircraft plasma turret seen in Halo 5: Guardians.
 * - the Covenant defense structures used to protect the Covenant citadel as seen in Halo Wars, Halo: Spartan Assault, and Halo: Spartan Strike.
 * - the turrets seen in the Halo 3 multiplayer map, Snowbound, to prevent players from exiting the combat area.

Starship weapons

 * Plasma turret - The powerful plasma weapon used to launch plasma torpedoes.
 * Plasma cannon (starship) - An unguided ship-to-ship plasma weapon.