Protector Sentinel (Installation 00)

Protector Sentinels are a specialized variety of Forerunner Sentinel similar to the Super Sentinels.

Halo Wars 2
Protector Sentinels are exclusive to Ellen Anders, and can be made at the Firebase once the leader power has unlocked them. They are effective against vehicles, but are only okay against infantry, aircraft, and structures. Protector Sentinels are a good all-rounder air unit. In Blitz, Protector Sentinels cost 70 energy.
 * Info: Core Air, Sentinel Detonation, Sentinel Beam.
 * Tier: 0
 * Cost: Population 3, Supplies 200, Power 15
 * Protector Sentinel upgrades
 * Drone Escort
 * Info: Increased damage, Increased health, Lockdown Bolt unlocked, have additional two Aggressor Sentinels as an escort
 * Tier: 2
 * Cost: Supplies 0, Power 500
 * Defense Grid
 * Info: Increased speed, Detonate on destruction
 * Tier: 3
 * Cost: Supplies 0, Power 600

Production notes
During the development of Halo Wars, a design for a cut Sentinel boss - intended to appear as an enemy in the campaign level Cleansing - was concepted and modelled through to final game asset. This model (shown below) remains in the game files of Halo Wars: Definitive Edition albeit untextured. The early design was later reused almost unchanged as the Protector Sentinels introduced in Halo Wars 2.

List of appearances

 * Halo Wars 2