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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|TF|GOO|IRIS}} |
| {{Forerunner infobox
| | [[Image:SilverSentinal02.jpg|thumb|right|300px|Sentinels in [[Halo 2]].]] |
| |name= Aggressor Sentinel
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| |image= [[File:HINF SentinelCrop.png|300px]]
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| |role=*Defense{{Ref/Reuse|Enc22}}
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| *Maintenance{{Ref/Reuse|Enc22}}
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| *Offense{{Ref/Reuse|Enc22}}
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| *Utility{{Ref/Reuse|Enc22}}
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| |first seen=
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| |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}}
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| |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}}
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| |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>
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| [[Heatwave]] {{C|rarely}}{{Ref/Game|Id=HINF|HINF}}
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| |armor=[[Energy shields]]{{Ref/Reuse|Enc22}}
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| }}
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| {{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>}}
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| '''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==
| | A '''Sentinel''' is a primordial [[Forerunner]]-constructed automated electronic construct with limited [[Artificial Intelligence]]. |
| [[File:Halo3-21146876-Full-crop.jpg|250px|left|thumb|[[John-117]] has a face-to-face encounter with an Aggressor Sentinel on [[Installation 00]].]]
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| ===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}}
| | ==Introduction== |
| | Sentinels were designed to guard the [[Halo]] installations and other [[Forerunner]] constructions, and are under the jurisdiction of the local [[Monitor]]. They are the guardians of [[Halo]], and appear to be hovering drones that are armed with cutting lasers. These lasers are used to control the [[Flood]], though they can only manage them for short periods. When not engaged in combat, they contract into smaller forms, concealing their weaponry. Some Sentinels are equipped with [[Energy Shields]], though all Sentinels can be easily destroyed by [[Plasma|Plasma weapons]], and human weapons such as the [[Assault Rifle]]. Sentinels also appear to utilize a high-speed method of propulsion when they need to travel great distances, as seen in [[Halo 3]]. |
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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}}
| | [[Image:Sentinel Shielding.jpg|thumb|right|300px|The unique, powerful shielding that protects [[Sentinel Majors]].]] |
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| ===Operation=== | | ==Functions== |
| [[File:H3 Sentinel Shielding.jpg|thumb|250px|An Aggressor Sentinel's energy shield.]] | | Sentinels have been known to have been created long before [[Installation 04]] was ever conceived. They operated automated facilities such as [[Gas Mine]]s like the one found on [[Threshold]] for "untold centuries" before the facility was redesigned to research the [[Flood]]. Therefore it is possible that they were only outfitted for combat ''after'' the [[Flood]] was discovered. |
| 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}}
| | The Sentinels are the "police" of the [[Halo]] installations, and are controlled by the [[Monitor]] of the Installation. Their primary purpose is to contain small outbreaks of [[Flood]], however they can only manage the [[Flood]] for a short time.<ref>[[Halo Combat Evolved]], the Library.</ref> Should an outbreak grow beyond the Sentinels' ability to control, [[Enforcers]] and shielded [[Sentinel Majors]]) are activated by the [[Monitor]] of the Installation to assist the Sentinels. |
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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>
| | On the level [[The_Arbiter_(Level)|The Arbiter]], as you enter the main hangar with the [[Seraph]] fighter, you can see one Sentinel firing a green beam, the same as the ones used by the [[Constructor]] drones in the [[Sacred_Icon_(Level)|Sacred Icon level]]. This shows that at least some Sentinels serve repair functions. You can also see the Sentinels carrying gas canisters. |
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| ===Combat behavior===
| | ==Combat== |
| [[File:H2A FirinMahLazer.png|thumb|225px|left|An Aggressor Sentinel firing its sterilization beam.]] | | [[Image:Sentinel Firing.jpg|thumb|right|300px|A Sentinel firing its [[Sentinel Beam|beam weapon]].]] |
| 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}}
| | They are equipped with an energy [[weapon]] called a [[Sentinel Beam]]. In [[Halo 2]], after a Sentinel is destroyed, these weapons can be picked up and wielded by a foot soldier. In [[Halo: Combat Evolved]], when destroyed, there is no weapon to pick up. When not engaged in [[combat]], they contract into smaller forms, concealing their weapon. In later levels of Halo 2, [[Sentinel Majors]] with personal [[energy shields]] and a more powerful blue beam make their debut, though all Sentinels are easily destroyed by [[plasma]] weapons. |
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| [[File:HW2-Sentinel bombardment.png|thumb|250px|Thousands of Aggressors swarming the ''[[Enduring Conviction]]''.]]
| | When a Sentinel is destroyed by any kind of explosive weapon or any weapon that can do a lot of damage in one shot it causes a blue EMP blast that has an extremely large radius, which can deplete personal energy shields, [[Jackal]] arm shields, temporarily shutdown nearby Sentinels, can cause [[Grunts]] and Jackals to cover their head with their hands and can rarely even kill an [[Elite]] or [[Spartan]] if their shields are already down. |
| 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>
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| ==Variants==
| | In Halo: Combat Evolved, Sentinels will give off sparks for several seconds if they take serious damage. Also, if a [[Sentinel]] gets meleed (usually by a [[Flood]] [[Combat Form]]) it makes a metal clang noise and does nothing. When destroyed, they will crash to the floor and violently explode with enough force to seriously hurt or even kill unshielded enemies. The same happens in Halo 2, but being hit with an [[energy sword]] will cause it to explode and release an EMP blast. In [[Halo 3]], no matter what weapon is being used, a Sentinel getting meleed will be sent flying away then exploding but with a small EMP blast if it hits something while flying away. |
| *'''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}}
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| <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}}
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| <gallery>
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| 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==
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| [[File:AggressorSentinelEvolution-RefChart.jpg|thumb|350px|Evolution of the Aggressor Sentinel's design from ''Halo: Combat Evolved'' to ''Halo 4''.]] | |
| ===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''===
| | During the last level (Halo) on Halo 3 the sentinels fire at your warthog and seem to push the warthog whilst in the air. |
| * There is now only one variant of Sentinel: the standard grayish-silver type.
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| * The Sentinel now sports a blue "eye" and teal lights.
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| ===Changes from ''Halo 3'' to ''Halo 4''===
| | Despite its being integrated into the Sentinel, when destroyed the player can use the [[Sentinel Beam]] in campaign, and the weapon is available in multiplayer, in both Halo 2 and Halo 3. |
| * Sentinels have undergone a moderate visual redesign, now sporting a more rounded carapace.
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| * 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''===
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| * Sentinels are more expressive in their muteness and will tilt and move their arms in various situations.
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| * 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''===
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| *'''Info''': A flying Forerunner unit, the Sentinel will inflict corrosive damage with a dangerous beam weapon.
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| **'''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.
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| ===''Halo Wars 2'' Open Beta===
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| These units will defend the [[Domination Point]] in [[Domination]].
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| ===''Halo Wars 2''===
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| 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]]'', a drone of [[Forerunner|alien]] design 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 other installations. |
| *Chris Hughes created the original concept art of the Aggressor Sentinel.<ref>'''[[The Art of Halo]]''', ''page 44''</ref> | | *In [[Halo:Combat Evolved|Halo:Combat Evolved]], you can destroy any unshielded Sentinels in one shot with an overcharged [[Plasma Pistol]]. |
| *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.
| | *There is a 2D Ghost Sentinel near the [[Aegis Fate|frigate]] in Sandtrap that attacks and kills people on sight.{{fact}} |
| *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. | | *There is a [[Needler Sentinel]] found on the level [[Quarantine_Zone_(Level)|Quarantine Zone]]. It fires sporadic [[Needler]] rounds and drops a [[Needler]] gun when destroyed. This is an oversight made by [[Bungie]], and should ''not'' be considered part of the [[Halo universe]]. |
| *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. | | *In Halo: Combat Evolved, the [[MA5B|Assault Rifle]] has the same animation label as the [[Sentinel Beam]], making it possible to have a Sentinel with an [[Assault Rifle]]. However, there are no actual Sentinels that have [[Assault Rifles]] in the final product of the game. |
| | *It is possible to 'stick' a Sentinel with a [[Frag Grenade]]. The Sentinels' in game model is essentially hollow, so a well thrown frag can get stuck inside. This is easiest from in front and just above the target. |
| | *In Halo: CE, when a Sentinel is inactive, it will "fold" up its weapon into its body, and its arms will move closer to its body. |
| | *Like other allies, Sentinels will turn on you if you destroy three or more of them. [[343 Guilty Spark]] will also say some of the lines usually reserved for when you're dead. <ref>[[Halo: Combat Evolved]], [[the Library]] </ref> |
| | *Sentinels can be seen using the same beam as a [[Constructor]] in the level "The Arbiter" when the lift is taking you down into the first hanger. This suggests that they may be able to make basic repairs if the Constructors have been disabled or on Installations without them. (This would explain why Installation 04 is still in fairly good shape after hundreds of thousands of years) |
| | *You can see Sentinels on the [[Halo 3]] maps [[Construct]] and [[Isolation]]. Similar to the fish and birds seen in other multiplayer maps, you can shoot down Sentinels using long range weapons. |
| | *On [[Halo 3]] multiplayer maps [[Construct]] and [[Isolation]], when you put your cross-hairs on the Sentinels, your cross-hairs turn red. |
| | *On the level 'The Arbiter', the [[Elites]] joining the [[Arbiter]] referred to the Sentinels as 'Guardians' or 'Warriors' of the Halos. |
| | *Normal shielded Sentinels (like the ones in the Ark at the bridge you must activate) have relatively weak shields as it only takes 3-5 shots with the carbine to penetrate their shield and destroy them. |
| | *It is possible to "surf" sentinels (this is easiest on the [[The Ark (level)]] where you must activate the bridge for the [[Scorpion|Scorpions]] and [[Warthog]]s) by jumping on top of it. If you land on it successfully you can stay and hover on it. When you land on it one of two things will happen: it will move as normal at its normal height, or it will sink and float/move along touching the ground. Sometimes, Sentinels will float along the ground, making it easier to "surf". |
| | *There is a single sentinel in the [[Halo 2 level]], [[Quarantine Zone]] that fires short bursts of needlers and when destroyed, spawns a needler instead of a Sentinal Beam. |
| | {{spoilers}} |
| | *For a short period in [[Halo 3]], Sentinels are the player's allies again (A result of the [[Master Chief]] being reunited with [[343 Guilty Spark]]). However, [[Guilty Spark]] only had command of the Sentinels on Installation 04, It is hinted that the Sentinels on the Ark are either controlled or influenced by [[Mendicant Bias]]. The Sentinels on the replacement [[Installation 04]] are most likely controlled by [[Guilty Spark]]. Since [[Guilty Spark]] was destroyed, all Sentinels on the replacement [[Installation 04]] became hostile to anything on it. If you look carefully, the Sentinels may fall down with platforms on the level ''[[Halo]]'' . |
| | {{endspoilers}} |
| | *In Halo 3, the Shielding technology may be that of the Bubble Shield, created by the ONI. |
| | *In the last mission of Halo 3 (named Halo) the beam pushes your vehicle during the last part of the mission. |
| | *In Halo: Combat Evolved Sentinels would fold into a compact "idle" form while not in combat. In Halo 3, they will fold into this form and clatter to the floor when hit with small impacts, such as brushing against a passing vehicle. |
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| ==Gallery== | | ==Images== |
| ===Concept art===
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| <gallery> | | <gallery> |
| File:HCE Sentinel Concept 1.png|Early concept art of Sentinels in ''[[Halo: Combat Evolved]]''.
| | Image:SilverSentinal02.jpg|A pair of Sentinels in Halo 2. |
| File:HCE Sentinel Concept 2.png|Another early concept of Sentinels in ''Halo: Combat Evolved''.
| | Image:SilverSentinal01.jpg|A Sentinel in Halo 2. |
| File:H4-Concept-Sentinel-Variants.jpg|Conceptual explorations of an Aggressor Sentinel in ''[[Halo 4]]''.
| | Image:3Sentinals.PNG|[[Sentinel Major|Major Sentinels]] firing the distinctive, more powerful blue Sentinel beams. |
| File:HINF Concept SleepyBois.jpg|Pre-production concept art for ''[[Halo Infinite]]'' depicting a large number of inactive Aggressor Sentinels.
| | Image:Sentinalshield.jpg|Sentinel shielding from Halo PC. |
| File:HINF Concept CavalryHasArrived.jpg|Early ''Halo Infinite'' concept art showing [[Marine]]s fighting through Aggressor Sentinels to reach [[John-117]].
| | Image:Sentinal.jpg|A [[Halo 3]] Sentinel. |
| File:HINF Concept SentinelSwarms.jpg|Early ''Halo Infinite'' concept art depicting John-117 observing swarms of Aggressor Sentinels on Installation 07.
| | Image:1212706515 Idle Sentinel.jpg|A [[Halo 3]] Sentinel in its folded-up "idle" form. |
| 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> | | </gallery> |
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| ===Artworks=== | | ==Related Links== |
| <gallery>
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| File:Halo Escalation 21.jpg|Aggressor Sentinels on the cover of ''[[Halo: Escalation]] [[Halo: Escalation Issue 21|#21]]''.
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| </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===
| |
| <gallery>
| |
| File:HCE TheMaw EngineRoomChaos.jpg|Sentinels fighting the Flood in ''Halo: Combat Evolved''.
| |
| 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 ==
| | *[[Sentinel Beam]] |
| {{Col-begin}}
| | *[[Sentinel Launcher]] |
| {{Col-2}}
| | *[[Enforcer]] |
| *''[[Halo: Combat Evolved]]'' {{1st}}
| | *[[Sentinel Major]] |
| *''[[Halo: The Flood]]''
| | *[[Constructor]] |
| *''[[Halo 2]]''
| | *[[Sentinel Production Facility]] |
| *''[[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 ==
| | {{Forerunner2}} |
| {{Ref/Sources}} | |
|
| |
|
| {{Forerunner|sentinel}}
| | [[Category:The Forerunner]] |
|
| |
|
| [[Category:Sentinels]] | | [[Category:Technology]] |
