Used to support zealots in light of the protoss race's diminishing population, sentries are protoss combat drones. Sentries employ a disruption beam to attack their enemies, and offer protection through guardian shields.
Sentries can also project force field barriers to stall or split up opposing forces. This is done by turning bursts of energy into a small, impenetrable barrier to hinder, block, or funnel the advance of enemy troops. While creatures or machines of prodigious size can shatter the cohesion of these translucent force fields, ordinary soldiers and vehicles become fodder to protoss ranged weapons.
Sentries also have the ability to create hallucinatory images through an in-built holo-projector. These holograms can draw enemy fire while a real protoss strike force maneuvers into position to deliver the killing blow. These hallucinations are composed of solid light and are three-dimensional, able to mimic protoss warriors, vehicles, and constructs. Each replica, while limited in duration, is able to withstand some degree of punishment. The purpose of these life-like images is twofold: making the enemies of the protoss believe they’re fighting a much larger force than anticipated, and protecting protoss lives.
Energy manipulator unit
37 (32 warp gate cooldown)
The sentry has a beam which does continuous damage to one target. Due to their high gas cost compared to stalkers, as well as their low HP and attack power, sentries are better being used as support units for other troops rather than frontline fighters.
Sentry/stalker combinations are common in mid-game scenarios.
- For the terran-devised force field, see force field (terran).
Force Fields may be used to create walls and chokepoints to block or channel enemy units.
Force Field is smartcast.
Sentries can create an aura which reduces incoming ranged damage to friendly units by 2.
Sentries produce false copies of units to distract opponents. Duplicates have the same number of hit points as the original but take double the damage. The number of hallucinations created depends on the actual cost of the unit. It can spawn 4 probes, 2 high templar, stalkers or zealots, or 1 archon, colossus, immortal, phoenix, void ray or warp prism.
Hallucinations are instantly destroyed by psionic storm.
The sentry can create duplicates of units that the player doesn't meet the tech requirements for.
Hallucinations can be detected by detectors.
- +1 armor to shields per level.
Wings of LibertyEdit
Sentries are not usable in the StarCraft II: Wings of Liberty protoss mini-campaign.
Sentries can use Force Field to isolate enemy workers, preventing them from escaping their onslaught. Force Field also proves to be very effective for splitting forces or preventing them from passing through choke points. Melee units may be blocked with force fields and attacked with ranged units.
Guardian Shield is most effective against attackers with low base damage: marines and mutalisks. Guardian Shield protects all ground and air units positioned over the horizontal circumference of the shield (where the shield joins the ground), even if a protected air unit is not visually within the "bubble" of the shield. However, the shield is centralized around the sentry, and units moving outside its area of effect no longer gain its benefits. This means that Guardian Shield is best used by keeping the sentry close to the rest of the player's forces. If the sentry is destroyed, the effects of Guardian Shield will instantly end.
The table shows the effective health for a defender protected by Guardian Shield. The figure assumes the defender has 1 base armor (as is the case with most protoss units), and defender and attacker both have 1 defense and attack upgrade. For example, the defender lasts 66% longer against marines if protected by guardian shield.
|Attacker||Effective health of defending unit||Notes|
|Non-Armored defender||Armored defender|
|Mutalisk||167%||Includes reduction from bounces|
|Deployed siege tank||103%|
The comparisons vary only 0-2% assuming attack and defense upgrade levels remain evenly matched.
The Guardian Shield bonus is applied after the immortal's Hardened Shield. Therefore, effective health of an immortal protected by Guardian Shield is at least 125% (higher if the attacker deals <10 damage before the Guardian Shield bonus is applied).