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[[quoteright:350:[[VideoGame/ChildrenOfLiberty https://static.tvtropes.org/pmwiki/pub/images/children_of_liberty_guards_4484.jpg]]]]
[[caption-width-right:350:And now with [[BlindAlley 50% less peripheral vision]]!]]

A type of {{Mook|s}} native to the StealthBasedMission, PrisonLevel, and the NoGearLevel, which patrols around a certain area and alerts its allies if it spots something suspicious or an intruder. In {{Stealth Based Game}}s, these sorts of enemies must be evaded, knocked out, or killed in a certain way lest other mooks discover their downed ally and/or the player or even cause a game over.

Compared to regular Mooks, they can be nearly the same except having equipment used in monitoring for intruders and may have devices to alert allies such as alarms. They may be accompanied by dogs, or some fantastic counterpart, which assist them in sniffing out enemies and [[AttackAnimal attacking them]]. Alternatively they may use {{Surveillance Drone}}s for the same purposes. Stat-wise, they may be frailer than regular Mooks so they can be easily dispatched if done properly.

Typically these sorts of Mooks are classified as "security guards" or just "guards".

More often than not, Patrolling Mooks tend to be {{Invincible Minor Minion}}s that the player cannot fight back against. At best, the player character will be locked in a CardboardPrison when caught; sometimes Patrolling Mooks have to catch you to transport you there, and other times it only takes them spotting you for your character to surrender on the spot (often despite [[StupidSurrender being more than capable of fighting their way out in any other circumstance]]). At worst, Patrolling Mooks will be similar to the InstakillMook in that they can OneHitKill your character, if not causing an instant GameOver as soon as they see you. As a result, the former variant are usually more annoying than deadly, while the latter are real threats.

See also EnemySummoner, TheGuardsMustBeCrazy, and StationaryEnemy. Compare RoamingEnemy. Contrast StealthyMook.
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!!Examples:

[[foldercontrol]]

[[folder:Action]]
* ''VideoGame/TheEndTimesVermintide'': The Stormvermin Patrol [[RatMen Skaven]] consist of four to six {{Heavily Armored|Mook}} EliteMooks that patrol a stretch of area, which can easily take down heroes very quickly. Naturally, the best way to deal with them is to find a spot that's far from their patrol route and avoid them altogether.
* ''VideoGame/RiseToHonor'': The security guards in the stealth sections will patrol designated areas with their flashlights. Stepping into their flashlight beams is an instant GameOver as they call for backup to deal with you, but they're mostly blind and deaf to anything outside the beams with only a couple of exceptions: some guards are skittish and will check behind themselves if they think they hear something, while guards that patrol as a pair will react to their partner being taken out.
* ''VideoGame/ZoneOfTheEnders'': In the first game. In the map screen, you can see their patrolling routes and where they are.
[[/folder]]

[[folder:Action-Adventure]]
* ''VideoGame/BatmanArkhamAsylum'' and ''VideoGame/BatmanArkhamCity'': Later in the game, Mooks will have devices on them that alert each other if they are knocked out, causing the rest to be more cautious and more scared.
* ''VideoGame/CastleWolfenstein'': If one of the guards sees you while you aren't wearing a uniform (and for SS guards, even if you are), he will call out to alert other guards and possibly activate an alarm.
* ''VideoGame/TheLegendOfZeldaSkywardSword'': The Watcher awakens Guardians in the Silent Realm when it spots Link.
[[/folder]]

[[folder:Horror]]
* ''VideoGame/{{Detention}}'': Once you approach a lantern spectre, Ray needs to hold her breath and don't look at it the moment it lowers its head to check on her. It will strangle Ray to death once it spots her, should she fails to do any of the actions
* ''VideoGame/ThePersistence'': Blood Hounds are the only enemy who will open doors and enter different rooms. If it sees or hears you, closing the doors behind you won't stop it from coming after you.
* ''VideoGame/ResidentEvil6'': [[ImplacableMan Ustanak]] makes use of little flying bug things at one point to hunt you down. You had to sneak up and kill them from behind, and if one spotted you you'd better run for dear life for that dumpster. Making matters worse was that Ustanak would [[ItCanThink figure out]] to check the dumpster [[HaveANiceDeath on the third time]].
* ''VideoGame/SirYouAreBeingHunted'': Balloons, unarmed but equipped with searchlights, patrol the islands in search for the player. If they see you, they sound the alarm and attract other robots to your location.
[[/folder]]

[[folder:[=MMOs=]]]
* ''VideoGame/{{Warframe}}'': Data vaults in [[StealthBasedMission spy missions]] frequently feature guards that will run to trip the vaults SelfDestructingSecurity when they spot you. Grineer vaults in particular feature [[SurveillanceDrone sensor regulators]] which will trip the alarm the moment you get into their cone of view or land a non-lethal hit on them.
[[/folder]]

[[folder:Platformers]]
* ''VideoGame/MegaManZero1'': The first features a unique teal-colored Pantheon guardian with a conical line-of-sight that will call in reinforcements if spotted. They only appear in the stealth-based "Hidden Base" mission.
* ''VideoGame/SonicHeroes'': [[ColorCodedForYourConvenience Yellow Egg Flappers]] are equipped with searchlights and will summon enemies if you enter their field of vision.
[[/folder]]

[[folder:Roguelikes]]
* ''VideoGame/FTLFasterThanLight'': You may stumble upon [[TheRevolutionWillNotBeCivilized Rebel]] ships that will start charging up their FTL engines the moment they spot you. If you let them jump away, they will alert [[AdvancingWallOfDoom their fleet]] about your position, making it advance twice as fast on your next jump.
[[/folder]]

[[folder:[=RPGs=]]]
* ''VideoGame/{{Boktai}}'': The first game focuses heavily on this mechanic, which is found less and less as the franchise moves on and strays away from stealth. ''VideoGame/LunarKnights'' brings these guys back in the form of nasty DemonicSpiders that are quick, hard to avoid, even harder to kill, and [[InstantKill one-shot]] you in exactly ten seconds if they spot you.
* ''VideoGame/FinalFantasyXIII'': Most PreExistingEncounters who aren't nailed to a particular spot are this. They are usually easier than stationary enemies because you can get a preemptive attack on them while their back is turned.
* ''VideoGame/HorizonZeroDawn'': Both machines and humans make use of these. Watchers are unsurprisingly one of the most frequent enemy types used for this purpose. Aloy's [[AugmentedReality Focus]] can highlight the tracks of patrolling mooks to make it easier to evade or ambush them.
* ''VideoGame/AVeryLongRopeToTheTopOfTheSky'': Sneaking into Avishun Castle means sneaking around guards that move in set patterns, leaving blind spots that you can use to sneak around.
[[/folder]]

[[folder:Shooters]]
* ''VideoGame/BioShockInfinite'': The Boys of Silence act like this; if they detect you they will call in other opponents to attack you.
* ''VideoGame/Corridor7AlienInvasion'' have {{Oculothorax}} monsters whose roles are to locate you and alert other alien enemies. They look like eyeballs, fittingly enough.
* ''VideoGame/LuminousAvengerIx'': A couple of stages feature Patrol Bots that pace back and forth with their line of sight represented by an infared system. Getting spotted or attacking them will cause their head to lock in place and BeamSpam intruders until either of them go down, or escape a distance away from them. Bullit Dashing on them without being spotted will displace the robot's head and remove them as a threat.
* ''VideoGame/MedalOfHonorUnderground'' has a UniqueEnemy type in the Casablanca levels, German spies clad in white and wearing a red fez. They're very lightly armed (their sole weapon is a dinky little pistol) and have pathetic health, but when they see you they will run off to warn nearby German troops of your presence.
* ''VideoGame/PAYDAY2'': Security guards may patrol the various locations you are trying to rob. They'll raise the alarm if they see you or evidence of your activities, or if you fail to answer their [[DeadMansSwitch pager]] in time after killing/intimidating one.
* Guards act much the same in ''VideoGame/PAYDAY3'', though the pagers are more forgiving
[[/folder]]

[[folder:Stealth-Based Games]]
* ''VideoGame/MetalGearSolid2SonsOfLiberty'': This is the purpose of the regular soldiers. When they see you, they'll call for back-up and more heavily armored and better organized soldiers will arrive to assist; these guys are the real killers. These regular soldiers are little threat on their own (except on higher difficulties) and the real threat they pose is calling in these kill-squads.
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons''.
** A number of adventures have included guards who can summon reinforcements.
*** T1 ''The Village of Hommlet'': When one group of guards is encountered, they make a low hooting sound that brings more guards. If they're being defeated they start howling, which summons ''all'' of the remaining opponents.
*** T1-4 ''The Temple of Elemental Evil'': A group of hobgoblins will strike a gong to alert other nearby guards and bring them to attack.
*** ''Dragon'' magazine #132 article "With All the Trappings": a guard in the Grey Griffon Inn can pound on a gong with a mallet and arouse the entire inn.
** ''Dragon'' magazine #64 article "The Assassins' Run": In the ''TabletopGame/ForgottenRealms'' campaign setting, the Shadow Thieves use the title obstacle course for training purposes. In one of the rooms, trainees must prevent two guards from striking an alarm gong or they will fail the course.
[[/folder]]

[[folder:Visual Novels]]
* ''VideoGame/DanganronpaAnotherEpisodeUltraDespairGirls'': The Siren Monokuma sounds the alarm on its head to assemble other Monokumas if it spots Komaru.
[[/folder]]

[[folder:Other]]
* ''VideoGame/DesperadosWantedDeadOrAlive'': In one mission mid-game, there's one specific kind of Mexican bandit (wearing a blue jacket) that will run off to alert the boss if alerted, failing the mission (unless you kill them midway through, which is hard since they runs off down a road crawling with their buddies). They're dilligent to the point of immediately pegging it if they hear Cooper's watch chime or see Kate ShowSomeLeg[[note]]even though the pink cone of view shows that they clearly get interested[[/note]].
[[/folder]]

!!Non-Game Examples

[[folder:Fan Works]]
* ''Fanfic/TouhouDoujinDawitsusFolly'': Ran Yakumo is notably [[spoiler:the only Shikigami of Dawitsu shown to be capable at dealing with intruders.]]
* In the ''Literature/{{Discworld}}'' of Creator/AAPessimal, the Guild of Assassins teaches ''strategies'' for dealing with anyone guarding the client, as it is considered to be bad manners and exceedingly poor professional technique for the Assassin to inhume anyone other than the client they are contracted for. Assassins are also taught to be polite and courteous to servants and hired help, in whatever context they encounter them. Therefore there are strategies for ''incapacitating'' bodyguards, footsoldiers and all those others who might come under the general heading of "mook". This might, for instance, involving dropping a quantity of an ergot-based psychotropic drug in the tea-urn, so that the guards have [[MushroomSamba an altered state of consciousness]] for a few hours in which black-clad Assassins (if glimpsed) are taken to be part of a bad trip.
[[/folder]]

[[folder:Films -- Live-Action]]
* ''Film/RioLobo'': The bad guys have henchmen marching around parts of town at night (who Cardona narrowly evades) and doing the same to guard the BigBad's ranch.
* Inverted in ''Film/SupermanII'': Non, one of the bad guys, kills a guard with a NeckSnap, but not before the guard activates a device on his belt and raises the alarm.
[[/folder]]

%%[[folder:Webcomics]]
%%* ''Webcomic/{{Zoophobia}}'': Bob and Larry.
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