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{{ | {{Era|Forerunner|HCW|Post}} | ||
{{Forerunner Infobox | |||
{{Forerunner | |||
|name= Aggressor Sentinel | |name= Aggressor Sentinel | ||
|image= [[File: | |image= [[File:H4 Sentinel.png|300px]] | ||
|role= | |role= Combat and defense | ||
|first seen= | |first seen= | ||
|length={{Convert|9.6|ft|m|sp=us|disp=flip}} | |length={{Convert|9.6|ft|m|sp=us|disp=flip}}<ref name="h4evg"/> | ||
|width={{Convert|6.3|ft|m|sp=us|disp=flip}} | |width={{Convert|6.3|ft|m|sp=us|disp=flip}}<ref name="h4evg"/> | ||
|height={{Convert|5|ft|m|sp=us|disp=flip}} | |height={{Convert|5|ft|m|sp=us|disp=flip}}<ref name="h4evg"/> | ||
|armament=[[Sentinel beam]] | |armament=[[Sentinel beam]] | ||
|armor=[[Energy shields]] | |||
|armor=[[Energy shields]] | |||
}} | }} | ||
{{Quote|Sentinels! The holy warriors of the sacred rings!|A Special Operations Sangheili exclaimed upon seeing Aggressor Sentinels in the [[Threshold gas mine]]<ref name="TA">'''[[Halo 2]]''', campaign level ''[[The Arbiter]]''</ref>}} | {{Quote|Sentinels! The holy warriors of the sacred rings!|A Special Operations Sangheili exclaimed upon seeing Aggressor Sentinels in the [[Threshold gas mine]]<ref name="TA">'''[[Halo 2]]''', campaign level ''[[The Arbiter]]''</ref>}} | ||
''' | '''Z-1500 Automated Systems Drones''' ('''Z-1500 ASD'''),<ref name="h4evg">'''[[Halo 4: The Essential Visual Guide]]''', ''page 133''</ref> more commonly known as '''Aggressor Sentinels''',<ref name="EVG">'''[[Halo: The Essential Visual Guide]]''', ''page 167''</ref> are [[Forerunner]] automatons programmed to act as security and maintenance drones, suppress small-scale [[Flood]] outbreaks, and protect Forerunner installations. As the basic type of the fairly inclusive [[Sentinel]] class, Aggressors are generally referred to simply as '''Sentinels'''.<ref name="EVG"/> | ||
== | ==Design details== | ||
[[File: | [[File:H2-ThreeSentinelAggressors.png|250px|left|thumb|Three specialized Sentinels, as hinted by their gold chassis.]] | ||
Aggressor Sentinels have two arm-like appendages, with two fine manipulators at the end of each arm. Their central head rests above a curved undercarriage housing an offensive [[Sentinel beam]]. Their powerful beam weapons and defensive energy shields make them very effective in combat against intruders or foreign objects that present themselves as threats. Their smaller lasers are used for both repairing damaged Forerunner constructs in conjunction with [[Constructor]]s, and self-repair should the Aggressors be damaged in combat.<ref name="encyclopedia"/> Aggressors are propelled by both an anti-gravity unit located on the undercarriage and small, exotic form of [[impulse drive]] which enables them to travel at high speeds.<ref name="h4evg"/> They are also capable of tapping into their installation's [[teleportation grid]].<ref name="h4evg"/> | |||
Aggressor Sentinels have two arm-like appendages, with two fine manipulators at the end of each arm. Their central head rests above a curved undercarriage | |||
There are at least two | There are at least two variants of the Aggressor Sentinel; the most common model is grayish white in color while the specialized model is golden. The differences between the two variants lie solely on their offensive and defensive systems; the gold-colored version sports superior weaponry and shielding system to the common grayish-white model's. | ||
Aggressors are created at [[Sentinel manufacturing facility|specialized manufacturing facilities]] located on every | Aggressors are created at [[Sentinel manufacturing facility|specialized manufacturing facilities]],<ref name="encyclopedia"/> massive airborne platforms that are located on every Halo installation and on other key Forerunner installations such as [[shield world]]s. These compounds produce Sentinels when facing either a Flood outbreak or an external threat to their local installation. The massive assembly lines, at maximum performance, can produce Sentinels at a very fast rate to either supplement existing Forerunner defenses or to replace those destroyed for whatever reason. | ||
===Operation=== | ===Operation=== | ||
[[File: | [[File:H3_Sentinel_Shielding.jpg|thumb|right|250px|A Sentinel's energy shield.]] | ||
Aggressors were utilized as all-purpose workers and guards on Forerunner stations. Following the construction of the [[Halo Array]], they were reconfigured to be the first line of defense against Flood outbreaks and other external intruders. The mechanical nature of the Aggressors make them ideal combat units against an enemy that could convert conventional biological infantry into biomass - by deploying the Aggressors en masse, the Forerunners could battle the parasite without contributing to its numbers. Controlled by their own basic AI functions, as well as their installation's [[monitor]], Aggressors patrol the installation's vast terrain and network tunnels tirelessly and attack as their protocol demands.<ref name="encyclopedia">'''[[Halo Encyclopedia]]''', "Chapter 8", ''page 226-227''</ref> | |||
When not in combat | When not in combat Aggressors serve as basic repair, maintenance, and security drones for Forerunner installations and facilities where Flood samples are kept, working in conjunction with [[Constructor]]s and [[Enforcer]]s to ensure that the facility remains in working order. | ||
The [[ | The [[Forerunner Dreadnought]], the [[San'Shyuum]]'s [[keyship]], was equipped with its own contingent of Sentinels. The San'Shyuum managed to adapt these machines to serve them in a combat support role. Aggressors under San'Shyuum control were used in battles during the [[War of Beginnings]] before the [[Covenant]]'s formation.<ref>'''Halo: Broken Circle''', ''pages 6, 9''</ref> The war depleted the Sentinels' numbers almost completely and the few that remained in ''[[High Charity]]'' were regarded as relics to be preserved and were no longer used in combat.<ref>'''Halo: Broken Circle''', ''page 189''</ref> | ||
===Combat behavior=== | ===Combat behavior=== | ||
[[File: | [[File:HW2-Sentinel bombardment.png|thumb|250px|left|Aggressors swarming the ''[[Enduring Conviction]]''.]] | ||
Aggressors are the first Forerunner automated defense systems to assist a situation and generate a proper response protocol. While Aggressors are strong enough to handle small-scale battles, they are more of a supplement rather than a reliable combat system. The Aggressors' weapons systems are limited and not as powerful as some of the other Forerunner weapons employed against the Flood, and can only hold them at bay for a limited amount of time. | |||
The Aggressor's energy shield is their primary defense mechanism. Once taken down, it is susceptible to small-arms fire. When an Aggressor has been damaged beyond repair, it explodes violently and releases a powerful [[electromagnetic pulse]], a tactical last resort that disables all nearby electronics. | Because of their limited AI, they are only individually able to handle situations on a basic scale, which makes them vulnerable to strategic Flood attacks. Because of their limited intelligence they are not often able to perform evasive maneuvers when facing imminent attack and are usually destroyed. In overwhelming numbers, Aggressors are capable of impressive coordination and are more than capable of handling a situation for a certain time until more permanent measures can be applied. | ||
The Aggressor's energy shield is their primary defense mechanism. Once taken down, it is susceptible to any type of small-arms fire. When an Aggressor has been damaged beyond repair, it explodes violently and releases a powerful [[electromagnetic pulse]], a tactical last resort that disables all nearby electronics. | |||
When faced with a single threat of sufficient physical size, such as a [[capital ship]], Aggressors have been known to deploy en masse and create a swarm. Instead of using their individual weapons, they fly in formation and use their bodies as projectiles, causing enough damage to end the threat. This was seen during the [[Second Ark Conflict|conflict]] on [[Installation 00]] in [[2559]], when ''[[Enduring Conviction]]''<nowiki>'</nowiki>s [[energy projector]] was fired upon the surface of the Ark, breaking the installation's outer crust. Thousands of Aggressors on the installation were quick to respond, using their combined mass to tear the ship's hull apart and cut it into two pieces.<ref>'''[[Halo Wars 2]]'''</ref> | When faced with a single threat of sufficient physical size, such as a [[capital ship]], Aggressors have been known to deploy en masse and create a swarm. Instead of using their individual weapons, they fly in formation and use their bodies as projectiles, causing enough damage to end the threat. This was seen during the [[Second Ark Conflict|conflict]] on [[Installation 00]] in [[2559]], when ''[[Enduring Conviction]]''<nowiki>'</nowiki>s [[energy projector]] was fired upon the surface of the Ark, breaking the installation's outer crust. Thousands of Aggressors on the installation were quick to respond, using their combined mass to tear the ship's hull apart and cut it into two pieces.<ref>'''[[Halo Wars 2]]'''</ref> | ||
==Variants== | ==Variants== | ||
*''' | *'''Gold variant''': This variant acts just like an average shielded Aggressor Sentinel, but has more durable armor, faster recharging shields and utilizes a stronger blue Sentinel Beam. This variant was deployed during the Flood-outbreak on [[Installation 05]]. | ||
<gallery> | <gallery> | ||
File:H2A Gold Sentinel.png| | File:H2A Gold Sentinel.png|Gold variant | ||
</gallery> | </gallery> | ||
==Gameplay== | ==Gameplay== | ||
[[File:AggressorSentinelEvolution-RefChart.jpg|thumb|350px|Evolution of the Aggressor Sentinel's design | [[File:AggressorSentinelEvolution-RefChart.jpg|thumb|350px|Evolution of the Aggressor Sentinel's design throughout the ''Halo'' games.]] | ||
===Changes from ''Halo: Combat Evolved'' to ''Halo 2''=== | ===Changes from ''Halo: Combat Evolved'' to ''Halo 2''=== | ||
* The Aggressor Sentinel received a graphical update. | * The Aggressor Sentinel received a graphical update. | ||
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* Sentinels now fire a bluish-colored beam, similar to the beam of the golden Sentinel of ''Halo 2'', instead of an orange beam. | * Sentinels now fire a bluish-colored beam, similar to the beam of the golden Sentinel of ''Halo 2'', instead of an orange beam. | ||
* Sentinels will no longer explode when destroyed; instead they teleport away after sustaining severe damage. Because of this behavior, combined with the lack of the weapon's appearance in the game, the Sentinel beam cannot be obtained in ''Halo 4''. | * Sentinels will no longer explode when destroyed; instead they teleport away after sustaining severe damage. Because of this behavior, combined with the lack of the weapon's appearance in the game, the Sentinel beam cannot be obtained in ''Halo 4''. | ||
===''Halo Wars''=== | ===''Halo Wars''=== | ||
*'''Info''': A flying Forerunner unit, the Sentinel will inflict corrosive damage with a dangerous beam weapon. | *'''Info''': A flying Forerunner unit, the Sentinel will inflict corrosive damage with a dangerous beam weapon. | ||
**'''Cost:''' Population 1, Tech level 1, Supplies 100 | **'''Cost:''' Population 1, Tech level 1, Supplies 100 | ||
Aggressors appear in both campaign and Skirmish mode of ''Halo Wars'', serving as an air unit. In campaign, Aggressors are the primary Forerunner unit, appearing on levels set within [[ | Aggressors appear in both campaign and Skirmish mode of ''Halo Wars'', serving as an air unit. In campaign, Aggressors are the primary Forerunner unit, appearing on levels set within the [[Etran Harborage]]. Like all Forerunner units, they are hostile towards all three other factions, including UNSC, Covenant, and the Flood. They are produced from invisible spawn points that could not be targetted or destroyed. | ||
In Skirmish mode, neutral Aggressors are seen defending [[Forerunner fort]]s, which occupied base build sites, and bonus buildings such as the [[Forerunner supply elevator]] or [[Forerunner secondary reactor]]. Player-aligned Aggressors are only found on Skirmish maps [[Repository]] and [[Glacial Ravine]]. These two maps feature [[Sentinel factory|Sentinel factories]], where players can purchase Aggressors which can then be added to their forces. | In Skirmish mode, neutral Aggressors are seen defending [[Forerunner fort]]s, which occupied base build sites, and bonus buildings such as the [[Forerunner supply elevator]] or [[Forerunner secondary reactor]]. Player-aligned Aggressors are only found on Skirmish maps [[Repository]] and [[Glacial Ravine]]. These two maps feature [[Sentinel factory|Sentinel factories]], where players can purchase Aggressors which can then be added to their forces. | ||
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===''Halo Wars 2''=== | ===''Halo Wars 2''=== | ||
Aggressors Sentinel are normally a hostile unit, but [[Professor Anders]]' upgrade for the Protector Sentinel allows Aggressor Sentinels to be its escort. Aggressors have a smaller version known as the Sentinel Swarm, which is impervious to most attacks, except when struck by an EMP MAC or the Aggressor Sentinel coordinating it is destroyed.<ref>'''Halo Wars 2''', Campaign level ''[[The Cartographer]]''</ref><ref>'''Halo Wars 2''', Campaign level ''[[Gatecrashers]]''</ref> | Aggressors Sentinel are normally a hostile unit, but [[Professor Anders]]' upgrade for the Protector Sentinel allows Aggressor Sentinels to be its escort. Aggressors have a smaller version known as the Sentinel Swarm, which is impervious to most attacks, except when struck by an EMP MAC or the Aggressor Sentinel coordinating it is destroyed.<ref>'''Halo Wars 2''', Campaign level ''[[The Cartographer]]''</ref><ref>'''Halo Wars 2''', Campaign level ''[[Gatecrashers]]''</ref> | ||
==Trivia== | ==Trivia== | ||
{{Linkbox|gallery=yes}} | {{Linkbox|gallery=yes}} | ||
*Chris Hughes created the original concept art of the | *Chris Hughes created the original concept art of the Sentinel.<ref>'''[[The Art of Halo]]''', ''page 44''</ref> | ||
*A [[Needler Sentinel|lone Aggressor]] that fires sporadic [[Type-33 Guided Munitions Launcher|Needler]] rounds can be found on the ''Halo 2'' campaign level, ''[[Quarantine Zone]]''. The Aggressor will drop a Needler when destroyed. This is the result of developer experimentation with giving Sentinels different weapons. | |||
*On certain levels in ''Halo 3'', it is possible to 'surf' on Aggressor Sentinels, by standing on the furthest possible point from the front of the Aggressor. This is easiest on ''[[The Ark (level)|The Ark]]'', at the point where the light bridge must be opened for the Scorpions and Warthogs. The Aggressor will, eventually, hover over the edge, holding the player up about half of the time. Remaining on top of the Aggressor allows the player to reach inaccessible locations. | |||
*Aggressor Sentinels share both similar design and functions to that of the P'fhor Defense Drones from the [[Marathon|''Marathon'' series]]. In addition, they share the same weaknesses against shotgun and plasma/fusion pistol fire. | *Aggressor Sentinels share both similar design and functions to that of the P'fhor Defense Drones from the [[Marathon|''Marathon'' series]]. In addition, they share the same weaknesses against shotgun and plasma/fusion pistol fire. | ||
* | *In the ''[[Deliver Hope]]'' trailer, the shielding on the Covenant {{Class|CCS|battlecruiser}} appears similar to the energy shields on the Aggressors in ''[[Halo 3]]''. | ||
==Gallery== | ==Gallery== | ||
<gallery> | <gallery> | ||
File:HCE Sentinel Concept 1.png|Concept art of Sentinels in ''[[Halo: Combat Evolved]]''. | |||
File:HCE Sentinel Concept 2.png|Another concept art of Sentinels in ''Halo: Combat Evolved''. | |||
File:HCE-SentinelAggressor.png|A Sentinel in ''Halo: Combat Evolved''. | File:HCE-SentinelAggressor.png|A Sentinel in ''Halo: Combat Evolved''. | ||
File:HCE_TheMaw_EngineRoomChaos.jpg|Sentinels fighting the Flood in ''Halo: Combat Evolved''. | |||
File:H2-SentinelAggressor.png|A Sentinel in ''[[Halo 2]]''. | File:H2-SentinelAggressor.png|A Sentinel in ''[[Halo 2]]''. | ||
File:SilverSentinel02.jpg|A pair of Aggressors during the [[Battle of Installation 05]] in ''Halo 2''. | File:SilverSentinel02.jpg|A pair of Aggressors during the [[Battle of Installation 05]] in ''Halo 2''. | ||
File:H2-SentinelAggressor-Gold.png|The gold variant of the Aggressor Sentinel as seen in ''Halo 2''. | File:H2-SentinelAggressor-Gold.png|The gold variant of the Aggressor Sentinel as seen in ''Halo 2''. | ||
File:Sentinol.jpg|A basic overview of the Aggressor in '' | File:H3-SentinelAggressor.png|An Aggressor Sentinel in ''[[Halo 3]]''. | ||
File:Sentinel-OrthoSchem-scantransparent.png|An overview of the Aggressor Sentinel. | |||
File:Sentinol.jpg|A basic overview of the Aggressor in ''Halo 3''. | |||
File:SentinelFight-large.jpg|Sentinels fighting against the [[Covenant]]. | File:SentinelFight-large.jpg|Sentinels fighting against the [[Covenant]]. | ||
File: | File:H3_Sentinel_Shielding_2.jpg|A Sentinel's energy shield in ''Halo 3''. | ||
File: | File:H3_SentinelFiring.jpg|A Sentinel Aggressor firing its beam. | ||
File: | File:H3_IdleSentinel.jpg|An Aggressor in its folded-up "idle" form. | ||
File:Halo3-21146876-Full-crop.jpg|[[John-117]] has a face-to-face encounter with a Sentinel on [[Installation 00]]. | |||
File:PriorityTask-large-crop.jpg|Several squadrons of Sentinels head out to deal with the Flood. | File:PriorityTask-large-crop.jpg|Several squadrons of Sentinels head out to deal with the Flood. | ||
File:3Way2-large.jpg|Aggressor Sentinels firing their Sentinel beam weapons on several attacking Flood combat forms. | File:3Way2-large.jpg|Aggressor Sentinels firing their Sentinel beam weapons on several attacking Flood combat forms. | ||
File: | File:HaloWars-SentinelAggressor.png|An Aggressor Sentinel in ''[[Halo Wars]]''. | ||
File: | File:H4-Concept-Sentinel-Variants.jpg|Conceptual explorations of an Aggressor Sentinel in ''[[Halo 4]]''. | ||
File: | File:H4-Render-AggressorSentinel.jpg|Render of an Aggressor Sentinel in ''Halo 4''. | ||
File:Halo4-CarbineScope-SentinelAttack.jpg|Sentinels attacking a [[Mgalekgolo|Hunter]], as seen through the scope of a | File:H4-AggressorSentinel-ScanRender.png|Render of an Aggressor Sentinel in ''Halo 4''. | ||
File:Halo4-CarbineScope-SentinelAttack.jpg|Sentinels attacking a [[Mgalekgolo|Hunter]], as seen through the scope of a [[Type-51 carbine]] wielded by [[John-117]]. | |||
File: | File:Halo Escalation 21.jpg|Aggressor Sentinels on the cover of ''Halo: Escalation #21''. | ||
File:H2A Silver sent | File:H2A Silver sent.png|A Sentinel in ''Halo 2: Anniversary''. | ||
File:HW2B Sentinel.png|A Sentinel in the ''[[Halo Wars 2 Open Beta]]''. | File:HW2B Sentinel.png|A Sentinel in the ''[[Halo Wars 2 Open Beta]]''. | ||
File:HW2-Sentinels.png|Sentinels | File:HW2-Sentinels.png|Sentinels on Installation 00 in ''[[Halo Wars 2]]''. | ||
File:HW2-sentinels.jpg|A swarm of Aggressors in formation | File:HW2-sentinels.jpg|A swarm of Aggressors in formation. | ||
</gallery> | </gallery> | ||
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*''[[Halo: Blood Line]]'' | *''[[Halo: Blood Line]]'' | ||
*''[[Halo: Cryptum]]'' | *''[[Halo: Cryptum]]'' | ||
{{Col-2}} | |||
*''[[Halo: Combat Evolved Anniversary]]'' | *''[[Halo: Combat Evolved Anniversary]]'' | ||
**''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]'' | **''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]'' | ||
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*''[[Halo 4]]'' | *''[[Halo 4]]'' | ||
**''[[Spartan Ops]]'' | **''[[Spartan Ops]]'' | ||
*''[[Halo: Silentium]]'' | *''[[Halo: Silentium]]'' | ||
*''[[Halo: Spartan Assault]]'' | *''[[Halo: Spartan Assault]]'' | ||
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*''[[Halo Wars 2]]'' | *''[[Halo Wars 2]]'' | ||
*''[[Halo: Outpost Discovery]]'' | *''[[Halo: Outpost Discovery]]'' | ||
{{Col-end}} | {{Col-end}} | ||
