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| {{Status|Canon}}{{Status|Featured}} | | {{Ratings}} |
| {{Disambig header|the standard sentinel introduced in ''[[Halo: Combat Evolved]]''|the golden variant introduced in ''[[Halo 2]]''|Aggressor Sentinel Eliminator}}
| | {{era|H1|H2|H3|HW|TF|GOO|LE|IRIS}} |
| {{Forerunner infobox | | {{Forerunner Infobox |
| |name= Aggressor Sentinel
| | |image = [[Image:Halo Wars Sentinel.jpg|290px]] |
| |image= [[File:HINF SentinelCrop.png|300px]] | | |name = Sentinel |
| |role=*Defense{{Ref/Reuse|Enc22}} | | |purpose = Combat and Defense |
| *Maintenance{{Ref/Reuse|Enc22}}
| | |strength = Moderate |
| *Offense{{Ref/Reuse|Enc22}}
| | |first seen = September 21 2552 |
| *Utility{{Ref/Reuse|Enc22}}
| | |aprox. size = {{Convert|2.48|m|ft}}<ref>[http://nikon.bungie.org/misc/sloftus_scalecomparison/?display=Flood '''Halo.Bungie.Org''': Scale Comparison]</ref> |
| |first seen= | | |primary = [[Sentinel Beam]] |
| |length={{Convert|9.6|ft|m|sp=us|disp=flip}}{{Ref/Reuse|h4evg}} - {{Convert|13.5|ft|m|sp=us|disp=flip}}{{Ref/Book|Id=Enc22|Enc22|Page=327}} | | |weaponry strength = Moderate |
| |width={{Convert|6.3|ft|m|sp=us|disp=flip}}{{Ref/Reuse|h4evg}} - {{Convert|7.4|ft|m|sp=us|disp=flip}}{{Ref/Reuse|Enc22}}
| | |defense = [[Energy Shields]] |
| |height={{Convert|5|ft|m|sp=us|disp=flip}}{{Ref/Reuse|h4evg}} - {{Convert|7.6|ft|m|sp=us|disp=flip}}{{Ref/Reuse|Enc22}}
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| |armament=[[Sentinel beam]] {{C|standard}}{{Ref/Reuse|Enc22}}<br> | |
| [[Heatwave]] {{C|rarely}}{{Ref/Game|Id=HINF|HINF}}
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| |armor=[[Energy shields]]{{Ref/Reuse|Enc22}} | |
| }} | | }} |
| {{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>}}
| | '''Sentinels''' are ancient, [[Forerunner]]-constructed [[Wikipedia:robot|robots]]. They possess limited [[Artificial Intelligence]], and are programmed to suppress [[Flood]] outbreaks and protect Forerunner technologies. |
| '''Aggressor Sentinels'''<ref name="EVG">'''[[Halo: The Essential Visual Guide]]''', ''page 167''</ref> {{ZClass|1500|Automated Systems Drones|ASD}}<ref name="h4evg">'''[[Halo 4: The Essential Visual Guide]]''', ''page 133''</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/Reuse|EVG}}
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| ==Overview== | | ==Introduction== |
| [[File:Halo3-21146876-Full-crop.jpg|250px|left|thumb|[[John-117]] has a face-to-face encounter with an Aggressor Sentinel on [[Installation 00]].]]
| | Built contemporaneously with the construction of the Halo Array, Sentinels were utilized as all-purpose workers and guards on Forerunner stations. Following the construction of the Halo Installations, Sentinels were reconfigured to be the first line of defense against Flood outbreaks and other external intruders. The mechanical nature of the Sentinels make them ideal combat units against an enemy that could convert conventional biological infantry into biomass - by deploying the Sentinels in mass, the Forerunners could battle the flood without contributing to its numbers. Controlled by their own basic AI functions, as well as their Installation's Monitor, Sentinels patrol the Halo rings tirelessly and attack as their protocol dictats.<ref name="encyclopaedia">'''[[Halo Encyclopedia]]''', Chapter 8, page 226/227</ref> |
| ===Design details===
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| 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 generally housing an offensive [[Sentinel beam|sterilization 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. Aggressor Sentinels are also equipped with a small [[reconstitution emitter]], which uses lasers to repair damaged [[Forerunner]] constructs in conjunction with [[Constructor]]s and for self-repair should the Aggressors be damaged in combat.{{Ref/Reuse|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/Reuse|h4evg}} They are also capable of tapping into their installation's [[teleportation grid]].{{Ref/Reuse|h4evg}}
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| There are at least two major variants of the Aggressor Sentinel. The standard model is gray or silver in color while the specialized [[Aggressor Sentinel Eliminator]] is golden. The differences between the two variants lie solely on their offensive and defensive systems, with the Eliminator sporting superior weaponry and shielding systems.{{Ref/Level|Id=SI|H2|Level=Sacred Icon}}{{Ref/Level|Id=QZ|H2|Level=Quarantine Zone}}{{Ref/Reuse|HINF}}
| | When not in combat Sentinels serve as basic repair, maintenance and security drones for Forerunner installations and facilities where Flood samples are kept, working in conjunction with [[Constructors]] and [[Enforcers]] to ensure that the facility remains in working order. Sentinels are viewed by the Covenant as "Holy Warriors of the Sacred Rings,"<ref>'''[[Halo 2]]''' ''level'' [[The Arbiter (Level)|The Arbiter]]</ref> machines meant to be worshiped and respected by all who believe in the covenent and the great journy. |
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| Aggressors are created at [[Sentinel manufacturing facility|specialized manufacturing facilities]] located on every [[Halo Array|Halo installation]] and on other key Forerunner installations.{{Ref/Reuse|encyclopedia}} These facilities can consist of large airborne platforms or [[Sentinel factory|subterranean factories]] where Aggressors are birthed in nanomachine vats and programmed to serve.{{Ref/Reuse|QZ}}{{Ref/Game|Id=HW|HW}}{{Ref/Book|Id=Enc22p326|Enc22|Page=326}} Each Forerunner installation has its own design of the Aggressor Sentinel, but they all share the same basic structure and purpose.{{Ref/Reuse|Enc22}}
| | ===Design=== |
| | Sentinels are grayish white in color and have two arm like appendages with two grapple fixtures at the end of each arm and a central "head," curved undercarriage containing an offensive [[Sentinel Beam]]. The form of a Sentinel may differ depending on the situation of their Installation. Their powerful offensive beam weapons and defensive energy shield 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, and self-repair should the Sentinel be damaged in combat.<ref name="encyclopaedia"/> Sentinels are propelled by both an anti-gravity unit located on the undercarriage and small engines on the back of the unit, they are capable of traveling at high speeds but cannot sustain long range travel. |
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| ===Operation===
| | Sentinels are created at [[Sentinel Constructor Factory|Sentinel Production Facilities]]<ref>[[Halo Encyclopedia]] Chapter 8, page 226</ref>, massive floating platforms that are located on every Halo Installation. These Facilities produce all types of Sentinels when facing either a Flood outbreak or an external threat to a Halo Installation or Construct. These 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. Sentinel Production Facilities are not limited to just the Halo Installations, Production Facilities are located on every Forerunner Construct that relies on Sentinels for guarding, although these facilities are different in appearance and may be either ground or mobile based platforms. |
| [[File:H3 Sentinel Shielding.jpg|thumb|250px|An Aggressor Sentinel's energy shield.]] | |
| Aggressor Sentinels were deployed in massive numbers during the [[Forerunner-Flood war]].{{Ref/Reuse|Enc22}} Unlike their own [[Warrior-Servant|biological soldiers]] that could be converted into biomass, the mechanical nature of the Aggressor Sentinels allowed the Forerunners to battle the [[Flood]] without contributing to its numbers.{{Ref/Reuse|encyclopedia}} Billions are estimated to be active across the myriad of Forerunner installations where they are utilized as all-purpose workers and guards.{{Ref/Reuse|Enc22}} Following the construction of the Halo Array, they were installed on the ringworlds as their first line of defense against Flood outbreaks and other external threats. Controlled by their own basic ancilla 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 (2009 edition)]]''', "Chapter 8", ''page 226-227''</ref>
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| 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.{{Ref/Reuse|SI}}
| | ===Combat=== |
| | The Forerunners refer the Sentinels as "''our very basic countermeasures,''" and are the first automated defense systems to assist a situation and generate a proper response protocol. While Sentinels are strong enough to handle a situation they are, however, more of a supplement rather then a reliable combat system. The Sentinels weapons system 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. |
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| The [[keyship]] ''[[Anodyne Spirit]]'' was equipped with its own contingent of Aggressor Sentinels. The [[San'Shyuum]] managed to adapt these machines to serve them in a combat support role, using them in battles during the [[War of Beginnings]] before the [[Covenant]]'s formation.<ref>'''Halo: Broken Circle''', ''pages 6, 9''</ref> The war depleted the keyship's Sentinel contingent 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>
| | Because of their limited A.I, they are only 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 large overwhelming numbers Sentinels are more than capable of handling a situation for a certain time until more permanent measures can be applied. |
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| ===Combat behavior===
| | The Sentinels energy shield is the primary defense mechanism, once taken down the Sentinel is susceptible to any type of small arms fire. When the Sentinel has been damaged beyond repair the Sentinel explodes violently and releases a powerful EMP blast. This EMP blast is a strategic last resort, as the EMP blast will disable any nearby electronics, including any weapons the enemy may be using. |
| [[File:H2A FirinMahLazer.png|thumb|225px|left|An Aggressor Sentinel firing its sterilization beam.]]
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| Aggressor Sentinels are the first automated defense systems to assist a in a given situation and generate a proper response protocol, deploying to an area of interest via [[Sentinel launcher|wall-mounted launchers]].{{Ref/Reuse|SI}}{{Ref/Reuse|HINF}} 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.{{Ref/Reuse|SI}}{{Ref/Reuse|QZ}} Because of their limited ancilla, they are only individually able to handle situations on a basic scale, which makes them vulnerable to strategic Flood attacks.{{Ref/Reuse|Enc22p326}} Their limited intelligence means they are often unable to perform evasive maneuvers when facing imminent attack and are usually destroyed.{{Ref/Reuse|SI}}{{Ref/Reuse|QZ}}{{Ref/Reuse|HINF}} 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.{{Ref/Reuse|Enc22p326}}
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| 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.{{Ref/Reuse|SI}}{{Ref/Reuse|QZ}} If all other members of a swarm of Aggressors have been destroyed, the last remaining Aggressors have, on occasion, been observed to overload their core while attempting to ram nearby belligerents.{{Ref/Reuse|HINF}}
| | ==Variants== |
| | Different variants of the Sentinel have been utilized for different combat roles from and can vary from construct to construct; the following is a list of all known variants of the Sentinel. |
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| [[File:HW2-Sentinel bombardment.png|thumb|250px|Thousands of Aggressors swarming the ''[[Enduring Conviction]]''.]] | | ===[[Sentinel Major]]=== |
| 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>
| | Sentinel Majors are larger, more powerful Sentinel models used for heavy combat situations. They provide backup for Enforcers in the event of a massive Flood outbreak or attacks on the any of the forrunner constructs and Halo Installations. |
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| ==Variants== | | ===[[Enforcer]]=== |
| *'''Standard Aggressor Sentinel''': Each Forerunner facility has its own unique variation of the standard Aggressor Sentinel, but they all share the same basic structural design and methods of operation.{{Ref/Reuse|Enc22}}
| | Essentially heavy Sentinels, Enforcers are equipped with a variety of offensive and defensive weaponry, including Heavy Needlers Missile Projectiles, Sentinel Beams, and duel Energy Shields covering both their top and bottom halves. They are designed to handle major Flood outbreaks but are also capable of defending their Halo Installation from external threats. |
| <gallery>
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| File:H3-SentinelAggressor.png|A chassis of the Aggressor Sentinel deployed during the [[Battle of Installation 00]] and [[Raid on Installation 08|Installation 08]].
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| File:HaloWars-SentinelAggressor.png|A chassis of the Aggressor Sentinel used during the [[Battle of Trove]].
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| File:H4 Sentinel.png|A chassis of the Aggressor Sentinel deployed during the [[Battle of Installation 05]] and [[Battle of Requiem|Requiem]] and the [[Second Ark Conflict]].
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| File:HINF SentinelCrop.png|A chassis of the Aggressor Sentinel used during the [[Battle for Zeta Halo]].
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| </gallery>
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| *'''[[Aggressor Sentinel Eliminator]]''': The Aggressor Sentinel Eliminator functions very similarly to the standard Aggressor Sentinel. However, they are fitted with gold-colored armor and a stronger energy shield. Eliminators are equipped with alternate weapons that can include a more powerful Sentinel Beam that fires blue energy or a Heatwave.{{Ref/Reuse|SI}}{{Ref/Reuse|QZ}}{{Ref/Reuse|HINF}}
| | ===[[Onyx Sentinel]]=== |
| <gallery>
| | Onyx Sentinels both guard and make up the Shield World of Onyx. Onyx Sentinels are far more formidable opponents for a variety of reasons. |
| File:H2A Gold Sentinel.png|A chassis of Aggressor Sentinel Eliminator deployed during the Flood-outbreak on [[Installation 05]].
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| File:HINF EliminatorCrop.png|A chassis of Aggressor Sentinel Eliminator deployed during the Battle for Zeta Halo.
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| </gallery>
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| ==Gameplay== | | ===[[Super Sentinel]]=== |
| [[File:AggressorSentinelEvolution-RefChart.jpg|thumb|350px|Evolution of the Aggressor Sentinel's design from ''Halo: Combat Evolved'' to ''Halo 4''.]] | | Considerably larger than normal Sentinels, Super Sentinels fill the same role of combating outside threats. |
| ===Changes from ''Halo: Combat Evolved'' to ''Halo 2''===
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| * The Aggressor Sentinel received a graphical update.
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| * There are now unshielded Aggressor Sentinels
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| * There are now two variants of Aggressor Sentinel: The standard grayish-silver and gold variants.
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| * The Aggressor Sentinel's [[Sentinel beam|beam weapon]] can now be used when the Sentinel is destroyed.
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| ===Changes from ''Halo 2'' to ''Halo 3''=== | | ===[[Protector Sentinel]]=== |
| * There is now only one variant of Sentinel: the standard grayish-silver type.
| | Roughly similar in appearance to regular Sentinels, Protector Sentinels occupy varying roles from healing or shielding other units to offensive capabilities similar to other sentinels. |
| * The Sentinel now sports a blue "eye" and teal lights.
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| ===Changes from ''Halo 3'' to ''Halo 4''=== | | ===[[Strato-Sentinel]]=== |
| * Sentinels have undergone a moderate visual redesign, now sporting a more rounded carapace.
| | Strato-sentinels are massive machines, used to construct large-scale installations including the Halo Array. |
| * Sentinels now make a much less shrill whirring sound while flying.
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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.
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| * 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''.
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| ===Changes from ''Halo 4'' to ''Halo Infinite''=== | | ===[[Unidentified Sentinel Variant]]=== |
| * Sentinels are more expressive in their muteness and will tilt and move their arms in various situations.
| | The largest Sentinel variant seen to date, this Sentinel variant is able to level entire cities with its weaponry. |
| * The [[Aggressor Sentinel Eliminator]] from ''Halo 2'' returns, this time equipped with a Heatwave instead of the Gold Sentinel Beam.
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| * Sentinels will now melee with their arms if an enemy gets too close.
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| * The last sentinel in a group will often overload with a loud sound and then charge the enemy, exploding.
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| * Sentinels are weak to shock weapons and take more damage when shot in their eye.
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| * Sentinels are not hostile to [[Banished]] forces and can be seen collaborating with them.
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| ===''Halo Wars''=== | | ==Appearances== |
| *'''Info''': A flying Forerunner unit, the Sentinel will inflict corrosive damage with a dangerous beam weapon.
| | First appearing in ''Halo: Combat Evolved'', the Sentinels play an important part in aiding the Master Chief through the [[Library]] as he attempts to recover the [[Activation Index]]. Once learning of Halo's true purpose the Sentinels become an enemy to the Chief as he attempts to destroy Halo. |
| **'''Cost:''' Population 1, Tech level 1, Supplies 100
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| 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 [[Trove]]. 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.
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| 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 ''Halo 2'', Sentinels, at one point, operated automated facilities, such as [[Threshold]]'s [[Gas Mine]], for "untold centuries". Evidence of this remains; some Sentinels have been seen repairing [[Covenant]] vessels as the Arbiter enters the main hangar with the [[Seraph]] fighter, a Sentinel fires a green beam at the Seraph -- the same beam as the ones used by [[Constructor]]s in [[Sacred Icon (Level)|Sacred Icon]]. |
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| ===''Halo Wars 2'' Open Beta===
| | Sentinels in ''Halo 3'' are also seen on the [[Ark]] and aids the Chief as he makes his way towards the cartographer After the death of 343 Guilty Spark the Sentinels once again become an enemy. A different variant of Sentinels have also been seen on [[Onyx]]; and serve as a shield to protect anything without proper clearance from getting near the Shield World. |
| These units will defend the [[Domination Point]] in [[Domination]].
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| ===''Halo Wars 2''===
| | In ''[[Halo Wars]]'', they serve as backup units that can be built at a [[Sentinel Shop]] along with [[Super Sentinel]]s. They cost 100 resources each. |
| 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> On the skirmish map, a group of three Aggressors can be seen guarding a Power Node and it has the ability to de-capture the Power Node should anyone takes control of it while the Aggressors is around. In Skirmish, Professor Anders can utilize her leader power '''Ark Defense''' and '''Sentinel Beacon''' to spawn the Aggressors Sentinel to draw the anti-air's attention.
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| ==Trivia== | | ==Trivia== |
| {{Linkbox|gallery=yes}}
| | *In ''[[Halo: Ghosts of Onyx|Ghosts of Onyx]]'', an Onyx Sentinel approaches [[Ash-G099|Ash]], one of Kurt's [[Spartan-IIIs]], and attempts to communicate with him, first in Latin, then in English. Later in the book, Dr. Halsey confirms that this drone was a Sentinel, therefore proving that the Sentinels of [[Onyx]] have a slightly more advanced [[AI]] than those of any other Installations (besides [[Monitors]]). |
| *Chris Hughes created the original concept art of the Aggressor Sentinel.<ref>'''[[The Art of Halo]]''', ''page 44''</ref> | | *There is a lone [[Needler Sentinel]] found on the level ''[[Quarantine_Zone (Level)|Quarantine Zone]]''. It fires sporadic [[Needler]] rounds and drops a Needler when destroyed. The Sentinel is non-canonical and is a development leftover. |
| *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.
| | *[[Chris Hughes]] created a crablike machine with many animating parts that gave the Sentinel life and character.{{Verify_source}} |
| *A [[Needler Sentinel|lone Aggressor Sentinel]] 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 Sentinels, by standing on the furthest possible point from the front of the Sentinel. This is easiest on The Ark, at the point where the light bridge must be opened for the Scorpions and Warthogs. The Sentinel will, eventually, hover over the edge, holding you up 50% of the time. Remaining on top of the Sentinel allows you to reach inaccessible locations. |
| *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. | | *The Bubble Shield, created by the ONI, shares many similarities to that of the shielding technology of the Sentinel, especially that of the [[Onyx Sentinel|model]] used at [[Onyx]]. |
| | | *Sentinels share both similar design and functions to that of the P'fhor Defense Drones from the [[Marathon (Video Game Series)]]. In addition, they share the same weaknesses of being unable to withstand [[Shotgun]] and [[Plasma Pistol]]/Fusion Pistol fire. |
| ==Gallery==
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| ===Concept art===
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| <gallery>
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| File:HCE Sentinel Concept 1.png|Early concept art of Sentinels in ''[[Halo: Combat Evolved]]''.
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| File:HCE Sentinel Concept 2.png|Another early concept of Sentinels in ''Halo: Combat Evolved''.
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| File:H4-Concept-Sentinel-Variants.jpg|Conceptual explorations of an Aggressor Sentinel in ''[[Halo 4]]''.
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| File:HINF Concept SleepyBois.jpg|Pre-production concept art for ''[[Halo Infinite]]'' depicting a large number of inactive Aggressor Sentinels.
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| File:HINF Concept CavalryHasArrived.jpg|Early ''Halo Infinite'' concept art showing [[Marine]]s fighting through Aggressor Sentinels to reach [[John-117]].
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| File:HINF Concept SentinelSwarms.jpg|Early ''Halo Infinite'' concept art depicting John-117 observing swarms of Aggressor Sentinels on Installation 07.
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| File:HINF Concept SentinelCorridor.jpg|Concept art of an Aggressor Sentinel navigating a corridor.
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| File:HINF-Concept-Aggressor2.jpg|Concept art of Aggressor Sentinels in ''Halo Infinite''.
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| File:HINF-Concept-Aggressor1.jpg|More concept art of Aggressors in ''Halo Infinite''.
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| File:HINF Concept Zeta Halo Damaged with Sentinels.jpg|Concept art of Aggressors in space around Installation 07.
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| File:HINF SentinelRepairServiceConcept.jpg|Concept art of Aggressors moving to repair Installation 07 in ''Halo Infinite''.
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| File:HINF Concept SentinelLumberjacks.jpg|Concept art of Aggressor Sentinels clearing fallen trees.
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| File:HINF Concept SentinelFishing.jpg|Concept art of Aggressor Sentinels patrolling a river.
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| </gallery>
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| ===Artworks=== | | == Gallery == |
| <gallery> | | <gallery> |
| File:Halo Escalation 21.jpg|Aggressor Sentinels on the cover of ''[[Halo: Escalation]] [[Halo: Escalation Issue 21|#21]]''.
| | Image:Sentinel.jpg|A Sentinel in ''[[Halo: Combat Evolved]]''. |
| | File:Sentinalshield.jpg|A Sentinel's shielding as seen in ''Halo: CE''. |
| | File:SilverSentinal02.jpg|A pair of ''Sentinels'' in ''[[Halo 2]]''. |
| | File:Sentinol.jpg|A Halo 3 Sentinel. |
| | File:1216051911 Sentinel.jpg|The Sentinel's Energy Shield as seen in Halo 3. |
| | File:1212706515 Idle Sentinel.jpg|A Sentinel in its folded-up "idle" form. |
| | File:Sentinel_Closeup.jpg|A close up of a Sentinel, circa Halo 2 |
| | Image:POAEngineRoom.jpg|Sentinels fighting the Flood. |
| </gallery> | | </gallery> |
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| ===Renders===
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| <gallery>
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| File:HCE-SentinelAggressor.png|A Sentinel in ''Halo: Combat Evolved''.
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| File:H2-SentinelAggressor.png|A Sentinel in ''[[Halo 2]]''.
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| File:Sentinel-OrthoSchem-scantransparent.png|An overview of the Aggressor Sentinel in ''[[Halo 3]]''.
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| File:H4-Render-AggressorSentinel.jpg|Render of an Aggressor Sentinel in ''Halo 4''.
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| File:H4-AggressorSentinel-ScanRender.png|Render of an Aggressor Sentinel in ''Halo 4''.
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| File:HINF-AggressorSilverRender1.jpg|Render of an Aggressor Sentinel in ''Halo Infinite''.
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| File:HINF-AggressorSilverRender2.jpg|Render of an Aggressor Sentinel with its eyes lit up in ''Halo Infinite''.
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| </gallery>
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| ===Screenshots===
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| <gallery>
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| File:HCE TheMaw EngineRoomChaos.jpg|Sentinels fighting the Flood in ''Halo: Combat Evolved''.
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| 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:Sentinol.jpg|A basic overview of the Aggressor in ''[[Halo 3]]''.
| |
| File:SentinelFight-large.jpg|Sentinels fighting against the [[Covenant]].
| |
| File:H3 Sentinel Shielding 2.jpg|A Sentinel's energy shield in ''Halo 3''.
| |
| File:H3 SentinelFiring.jpg|A Sentinel Aggressor firing its beam.
| |
| File:H3 IdleSentinel.jpg|An Aggressor in its folded-up "idle" form.
| |
| 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:HTMCC-H3ODST-Sentinels.png|Aggressor Sentinels in the ''[[Halo: The Master Chief Collection]]'' version of ''[[Halo 3: ODST]]'' [[Firefight]].
| |
| File:HW SentinelAggressor.png|An Aggressor Sentinel in ''[[Halo Wars]]''.
| |
| File:HW SentinelAggressorFiring.png|An Aggressor Sentinel firing its weapon in ''[[Halo Wars]]''.
| |
| File:Halo4-CarbineScope-SentinelAttack.jpg|Sentinels attacking a [[Mgalekgolo|Hunter]], as seen through the scope of a {{Pattern|Mosa|carbine}} wielded by John-117.
| |
| File:HTMCC-H4 AggressorSentinels 1.png|A trio of Aggressors in ''Halo 4'' ''[[Spartan Ops]]''.
| |
| File:HTMCC-H4 AggressorsVsKnight 1.png|Multiple Sentinels firing their weapons at a [[Promethean Knight]] in ''Halo 4'' ''Spartan Ops''.
| |
| File:H2A Silver sent.png|An Aggressor Sentinel in ''Halo 2: Anniversary''.
| |
| File:H2A Aggressor.png|A side view of the Sentinel in ''Halo 2: Anniversary''.
| |
| File:H2A SentinelBois.png|Two Aggressors alongside a Constructor in ''Halo 2: Anniversary''.
| |
| File:HW2B Sentinel.png|A Sentinel in the ''[[Halo Wars 2 Open Beta]]''.
| |
| File:HW2-Sentinels.png|Sentinels within Installation 00 in ''[[Halo Wars 2]]''.
| |
| File:HW2-sentinels.jpg|A swarm of Aggressors in formation in ''Halo Wars 2''.
| |
| File:HINF Founation Sentinels.png|Aggressors in a subterranean Forerunner facility in ''Halo Infinite''.
| |
| File:HINF sentinels.png|Some Aggressors patrolling on Installation 07 in ''Halo Infinite''.
| |
| File:HINF Aggressor Angled.png|A Sentinel Aggressor on the surface of Installation 07 in ''Halo Infinite''.
| |
| File:HINF Aggressor Beam.png|A Sentinel Aggressor firing its beam weapon in ''Halo Infinite''.
| |
| File:HINF SentinelScan.png|Aggressors scanning the wreckage of a {{Class|Mulsanne|light frigate}} in ''Halo Infinite''.
| |
| File:HINF Sentinel Scan.png|An Aggressor using its scanner in ''Halo Infinite''.
| |
| File:HINF Sentinel Shield.png|An Aggressor with its energy shield in ''Halo Infinite''.
| |
| File:HINF AggressorSelfDestruct.png|An Aggressor prepares to self-destruct in ''Halo Infinite''.
| |
| File:HINF CrashedAggressorSentinel.png|A crashed Aggressor on Installation 07 in ''Halo Infinite'' campaign.
| |
| File:HINF CrashedAggressorSentinel Fragmentation.png|A crashed Aggressor on Installation 07 in ''Halo Infinite'' map [[Fragmentation]].
| |
| </gallery>
| |
|
| |
| == List of appearances ==
| |
| {{Col-begin}}
| |
| {{Col-2}}
| |
| *''[[Halo: Combat Evolved]]'' {{1st}}
| |
| *''[[Halo: The Flood]]''
| |
| *''[[Halo 2]]''
| |
| *''[[Halo: Ghosts of Onyx]]''
| |
| *''[[Iris]]''
| |
| **''[[Halo 3: The Cradle of Life]]''
| |
| *''[[Halo 3]]''
| |
| *''[[Halo Wars]]''
| |
| *''[[Halo Legends]]''
| |
| **''[[Origins]]''
| |
| *''[[Halo: Blood Line]]''
| |
| *''[[Halo: Cryptum]]''
| |
| *''[[Halo: Combat Evolved Anniversary]]''
| |
| **''[[Terminal (Halo: Combat Evolved Anniversary)|Terminals]]''
| |
| *''[[Halo: Primordium]]''
| |
| *''[[Halo 4]]''
| |
| **''[[Spartan Ops]]''
| |
| {{Col-2}}
| |
| *''[[Halo: Silentium]]''
| |
| *''[[Halo: Spartan Assault]]''
| |
| *''[[Halo: Escalation]]''
| |
| *''[[Halo: Broken Circle]]''
| |
| *''[[Halo 2: Anniversary]]''
| |
| *''[[Halo: Hunters in the Dark]]''
| |
| *''[[Halo: Last Light]]''
| |
| *''[[Halo Mythos]]''
| |
| *''[[Halo: Fractures]]''
| |
| **''[[Promises to Keep]]''
| |
| *''[[Halo Wars 2]]''
| |
| *''[[Halo: Outpost Discovery]]''
| |
| *''[[Halo: Divine Wind]]''
| |
| *''[[Halo Infinite]]''
| |
| *''[[Halo: The Rubicon Protocol]]''
| |
| {{Col-end}}
| |
|
| |
|
| == Sources == | | == Sources == |
| {{Ref/Sources}}
| | <references/> |
| | |
| {{Forerunner|sentinel}}
| |
|
| |
|
| [[Category:Sentinels]] | | {{Forerunner}} |
| | [[Category:The Forerunner]] |
| | [[Category:Technology]] |
