Automated Turret (Fallout 3)

Automated turrets are robotic weapon systems

Specifications
Automated turrets come in two distinct variants, differentiated by both the mounting style and ammo type used. The ceiling mounted type is an automatic firearm shooting conventional bullets, whereas floor mounted turrets are energy weapons, firing laser beams similar to those of the laser rifle, but capable of much faster rate of fire. Both varieties have unlimited ammunition. As a rule of thumb, odd numbered turret models are conventional firearms, and even numbered turrets are energy-based.

Gameplay attributes
Automated turrets are often found in military installations or areas of historical value. Both types of turrets can be frenzied by shooting either the targeting chip (on ground units) or the lens (on ceiling units). Once frenzied, the turrets will fire on everything they see. All turrets can be shut down using the Robotics Expert perk if the player character can reach them unnoticed while sneaking. They can also be deactivated via nearby terminals (if any). Turrets will explode when destroyed, potentially dealing damage to the player character if they are standing close to the turret when it is destroyed.

Specifications
Alien turrets are always ceiling-mounted and can be harder to see, due to their much smaller size. They shoot energy beams similar to the alien atomizer and disintegrator in rapid salvos of five shots. The individual pulses aren't highly damaging, but can take a chunk out of the Lone Wanderer's health if they get caught out in the open for too long.

Gameplay attributes
While they cannot be shut down or frenzied via terminal, it is possible to remotely detonate them using nearby switches aboard the Mothership. They explode in a blast of green plasma, similar to a plasma grenade. Like normal turrets, they are unable to shoot directly below them and can be shut down using the Robotics Expert perk if the player character is able to reach them by jumping while crouched.

Mark I
These can be found in buildings and on bridges and ceilings. A couple are found at Fort Independence. These turrets are often used by organizations such as the Brotherhood Outcasts, but can be found widely across the wasteland. Even raiders use them as sentries. They can be frenzied just like any other turret when the player character cripples the lens.

Mark I (Operation: Anchorage)
These turrets are found throughout Operation: Anchorage, defending various strongholds in round bunkers, just outside the facilities.

Mark II
These turrets can be found both inside and outside buildings, as well as on bridges. All floor-mounted models have laser weaponry and can be frenzied when their targeting chip is destroyed. Some can be found outside the Citadel.

Mark II (Operation: Anchorage)
These turrets are found on the Chinese compound wall during the final quest in Operation Anchorage. As expected at this stage, these turrets have much higher Hit Points than the Mark I bunker turrets.

Alien turret (Mothership Zeta)
A ceiling-mounted turret of alien origin found aboard Mothership Zeta. Unlike its Earth equivalent, it is equipped with beam weaponry.

Appearances
Automated turrets appear in Fallout 3 and Fallout: New Vegas. Mark VII and Mark VIII turrets only appear in the Fallout 3 add-on Broken Steel.

Bugs

 * It's possible that alien turrets get glitched and appear with a permanent 0% hit chance in V.A.T.S., making it impossible to frenzy or destroy them through V.A.T.S.
 * When using V.A.T.S, it's possible that you will not inflict damage even with a 95% hit chance.