The Mega Turret, is a Covenant Uber unit, and is capable of dishing out considerable damage against enemy units. It is a Covenant Turret that fires three bolts of superheated plasma in quick succession, doing considerably high damage to nearby enemy units.
Its appearance, design and function is similar to that of Covenant Artillery.
 Operation history
During the Battle of Arcadia, the Covenant deployed a Mega Turret near one of Pirth City's spacesports. Another Mega Turret is deployed in the outskirts of Pirth City, but was destroyed by the UNSC forces from the UNSC Spirit of Fire. During the Battle inside Shield 0459, the Covenant forces abandoned one of their Mega Turrets near the exit that leads to the surface of Shield 0459.
The Mega Turret is a strong and resilient stationary unit. The only instances that they can be controlled are on the campaign level Escape and Skirmish level Tundra. A burst from the turret is strong enough to wipe out a squad of Marines. To destroy one, it is recommended to use units that has a high speed, because they can reach the turret before it fires at them. Another tactic is to attack from its back, since it takes time for it to turn around and fire. One can also exploit its long recharge time, by sending a cannon fodder unit as a distraction for the turret to eliminate, and then attack the turret with full force while it recharges.
In the level Escape, the Mega Turret is located next to the initial Covenant citadel, and can be used to destroy the base. Thanks to its long range of attack, one can also use it to destroy the Scarabs encountered in the level. An additional advantage is that it can fire on targets obscured by "the fog of war", requiring no nearby allies around its target unlike most leader abilities.
A hidden Mega Turret is in the level Repairs, but outside of the map since its blasts are being to used to represent those of the Covenant destroyer. The only way to see it is through the Repairs glitch.
 List of appearances
- Halo Wars (First appearance)
- ^ Halo Wars, campaign level Arcadia City
- ^ Halo Wars, campaign level Arcadia Outskirts
- ^ Halo Wars, campaign level Escape