Mega turret

The Mega Turret is a giant ground stationary weapon built by the Covenant. It is basically a long-range heavy Plasma Mortar.

Description
The Mega Turret, is an Uber unit found in Halo Wars, and is exactly what its name implies. Capable of dishing out considerable damage against enemy units, it is a Covenant Turret that fires three bolts of superheated plasma in quick succession anywhere on the map even beyond your line of sight, doing considerably high damage to nearby units. It is advised that you destroy it with a MAC Blast as soon as you see it. It is first encountered in the level Arcadia Outskirts, where it is an optional objective to destroy, and that should be done as soon as possible because of its power. It can also be seen earlier in Arcadia City on higher difficulties. There is also an unmanned Mega Turret on the level Escape. This turret must be captured early on to prevent the Covenant from manning it. It should also be noted that this turret does not appear in co-op. It appears in the middle of the skirmish map Tundra. It must be captured from rebels and garrisoned by infantry before it can be used. It does not fire automatically and must be fired and aimed manually.

Appearences
The Mega Turret appears in the following Halo Wars levels:

Campaign:
 * Arcadia City - Next to the Covenant Citadel located to the north-west.
 * Arcadia Outskirts - Middle section of the map, near a base building site.
 * Escape - Located to the north-east, near the main Covenant Citadel and the Black Box.

Multiplayer:
 * Tundra - Center of the map, guarded by rebel troops.

Trivia

 * This turret looks almost identical to the massive turrets found on Outskirts by the beach. It is unknown if they are the same, but they won't fire upon you and you also can not utilize it without mods.
 * The mega turret can fire at targets that are covevered in the fog of war mking it somewhat overbalanced.