Sentinel (Halo Movies)

Sentinels (7-1500 Automated Systems Drones) is a broad category of Forerunner-constructed robots designed to suppress Flood outbreaks in the Halo movies. They are also responsible for constructing and maintaining Forerunner structures, mining and retrieving raw materials and protect Forerunner technologies from alien lifeforms. They possess limited artificial intelligence and boost a wide range of weaponry and equipment in the field.

Sentinel Major
Sentinel Majors are upgraded Sentinels with a more resilient golden armor, a blue laser beam which fires energy at twice the rate and are protected by light energy shields. They assist the other Sentinels if a Flood outbreak grows beyond their ability to control.

Enforcer
Enforcers are large robotic automatons designed to prevent mass Flood outbreaks on Installations and guard key entrances, possessing three energy shields however they only protect the front of the machine. Enforcers are armed with pulse beams and missiles, as well as large claw-like arms which are able to pick up and rip apart most vehicles, resulting in the death of all it's occupants. However, Enforcers cannot detect enemies hidden in the shadows and after they lose track of their target, they will quickly lose interest and turn their back on the enemy, exposing it's weaker back which can be attacked to destroy the Enforcer.