Terror Radius

		Maybe it is the will to survive that makes me even more alert to sounds. Sight is limited in this darkened part of the world. In this case their heartbeats. Not my own, but instead the Killers' as they close in on me. I just hope that they do not pick up on mine as my heart races for every thump I can hear even clearer.
		~ Benedict Baker's Journal, Nov. 1896

		Again, my senses have proven to be the keys to my survival. If my heartbeat rings in my ears, the Killer is close. If I see the "red stain" in my surroundings, the Killer is even closer!
		~ Mysterious Note

The Terror Radius is an integral Game Mechanic in Dead by Daylight.

Overview

The Terror Radius is a feature intended to induce fear and anxiety in Survivors, causing them to experience The Heartbeat, a sound effect triggered whenever Survivors enter the Killer's Terror Radius and intensifies with proximity.

Terror Radius

For most Killers in Dead by Daylight, their Terror Radius is decided by their base Movement speed: 32 metres for those moving at 4.6 m/s and 24 metres for those moving at 4.4 m/s.

However, some Killers do not follow that general rule and either have a different Terror Radius altogether or even multiple Terror Radii, as can be seen in the Table below.

The Terror Radius has 2 components to it, the Heartbeat and the Terror Radius Layers.

The Heartbeat

The first component of a Killer's Terror Radius is the Heartbeat heard by Survivors whenever they are inside the Terror Radius.

Benedict Baker's Journal confirms that it is indeed a Survivor's own heart that beats audibly whenever the Killer is nearby.
This is further confirmed by a "Mysterious Note" found in the Fog and by the visibly beating heart model in the chest of Survivors.

The loudness and pace of the Heartbeat is tied directly to how close the Killer is to the Survivor in question.

Terror Radius Layers

The second component of a Killer's Terror Radius are the Terror Radius Layers.

The Terror Radius Layers are the musical component of the Terror Radius.
Each Terror Radius features 4 distinct Layers, with the possibility to add 2 additional Layers:

Layer	Proximity from Killer	Use Case	Additional Information
1	Far (1^st Third)	Terror Radius	-
2	Near (2^nd Third)	Terror Radius	-
3	Close (3^rd Third)	Terror Radius	Replaced by Layer 4 when in Chase.
4	Chase (3^rd Third)	Chase Music	Replaces Layer 3 when in Chase.
5	Chase (3^rd Third)	Chase Music	Added in addition to Layer 4 when 1 Mix Tape Add-on is used.
6	Chase (3^rd Third)	Chase Music	Added in addition to Layers 4 and 5 when 2 Mix Tape Add-ons are used.

Layers 1, 2, 3

Layers 1, 2, and 3 are used to signal proximity, akin to the Heartbeat.
They divide a Killer's Terror Radius into three equidistant radii, with each third of the Killer's Terror Radius playing one of the three Layers.

Layer 4

Layer 4 is reserved for when the Killer is in a Chase with a Survivor and replaces the third Layer of the Terror Radius.
Layer 4 is also referred to as the Chase Music and is what the Killer will hear when in a Chase.

Layers 5, 6

Layers 5 and 6 are reserved for additional music layers, which are added as embellishments on top of Layer 4 when the Killer is in a Chase, they do not replace other Layers.
This mechanic is currently only used for the Mix Tape Add-ons of The Legion.

Terror Radius Music

For a list of Terror Radius tracks and their instrumentation, click here.

Older Killers generally use one of 6 available generic Terror Radius Music themes, whereas newer and reworked Killers have their own, unique Terror Radius Music.

Older Killers, who have received a major rework, as well as all new Killers, have their own, unique Terror Radius Music, which makes them easily identifiable.

Chase Music

Killers do not hear their own Terror Radius music, instead they hear the general background music that plays on all Maps at all times until they enter a Chase with a Survivor.

As soon as a Killer initiates a Chase, they will hear the Chase Music, which is equal to Layer 4 of the Terror Radius.

Originally, when the Developers had first started to give Killers their unique soundtrack, it was intended that the Chase Music was a completely unique track, distinct from Layer 4 of the Terror Radius and only ever heard by the Killer.
However, for unknown reasons, after releasing two Killers with a distinct Chase Music, The Demogorgon and The Oni (see Trivia section), the Developers abandoned that practice, eventually removing the unique Chase Music from those two Killers as well.

Akin to the Terror Radius Music, older Killers use one of 3 available generic Chase Music themes, whereas newer and reworked Killers have their own, unique Chase Music.

Non-Terror-Radii

Some Killers have Terror-Radius-like mechanics that are, however, not considered to be true Terror Radii.
This includes mainly Lullabies and Fake Terror Radii.

Lullaby

Some Killers, in addition to their Terror Radius, feature what is referred to as a Lullaby.

The term "Lullaby" originates from the literal lullaby hummed by The Huntress, who was the first Killer to feature that mechanic and thus became the name-giver of it.
This is the reason why every Killer featuring the mechanic has it referred to as a "Lullaby", even though the audio cue itself may have nothing to do with lullabies or nursery rhymes, it is simply a name for a mechanic, in order to be consistent in the game's code.

Therefore, a Lullaby refers to any Terror-Radius-like audio cue which fulfils the properties listed below, which are different from those of a regular Terror Radius.

Properties

Lullabies are usually non-directional, though there are some exceptions:
- The Trickster has a distance-based non-directional Lullaby, allowing Players to gauge his distance based on the volume level, but not the direction.
- The Onryō has a directional Lullaby.^[1].
- The Dark Lord has a variable Lullaby, working like a non-directional Lullaby at a distance and like a directional Lullaby at a closer range.
Lullabies have a fixed, unalterable range.
- Lullabies are not affected by Unlockables that influence the Terror Radius.
- Lullabies are not suppressed by the Undetectable Status Effect.
  - Currently, the only for a Killer to suppress their Lullaby is for them to hide inside a Snowman, which only spawn during the recurring Bone Chill Winter Event series.

Lullaby-Killers

The Huntress: she hums a literal children's Lullaby; refers to the mechanic as a Lullaby.
The Nightmare: Survivors hear a nursery rhyme when inside the Dream World; refers to the mechanic as a Lullaby.
The Twins: Victor emits shrieks and groans when he is not with Charlotte; refers to the mechanic as Shrieks.
The Trickster: he emits a modified version of the first layer of his Terror Radius; refers to the mechanic as a Melody.
The Onryō: she emits a metallic screeching noise and the sound of ocean waves crashing while Demanifested and inside the Otherworld; refers to the mechanic as a Lullaby.
The Dark Lord: he emits bat shrieks and wing flapping sounds while in Bat Form.

It should be noted that even if the game refers to a Killer's Lullaby under a different (more appropriate) name, it is still coded as a "Lullaby" in the game's code.

Fake Terror Radius

Some Killers have the ability to alter their Power in a way that produces a Fake Terror Radius, which serves to confuse a Survivor.

Properties

Fake Terror Radii are auditorily indiscernible from a regular Terror Radius.
Fake Terror Radii have a fixed, unalterable range.
- Fake Terror Radii are not affected by Unlockables that influence the Terror Radius.
- Fake Terror Radii do not interact with any Unlockables that require the presence of an actual Terror Radius to activate/charge.
  - Perks like Diversion or Stake Out will not charge their Tokens while inside a Fake Terror Radius, which can be used to distinguish it from a real one.
  - Perks like Starstruck will not trigger the Exposed Status Effect for Survivors inside a Fake Terror Radius.

Fake-TR-Killers

The Hag: the Terror Radius emitted by a Mud Phantasm is a Fake Terror Radius.
The Doctor: the Illusionary Terror Radii inflicted by the "Calm" or "Discipline" Add-on Series is a Fake Terror Radius.
The Singularity: The Terror Radius inflicted by the Hyperawareness Spray Add-on is a Fake Terror Radius.

Visual Terror Radius

The Visual Terror Radius is an accessibility mechanic which can be enabled in the options menu.

When enabled, the Survivor's character model will show a literal heart beating in their chest whenever they are inside the Killer's Terror Radius.
The intensity of the beating heart corresponds to and is precisely in sync with the auditory heartbeat SFX, which is heard in addition to the Terror Radius music.

The heart VFX is visible even when the Survivor's character model is hidden, for example inside a Locker.

Off-Screen Indicator

When the Survivor's chest is off-screen, a HUD overlay of a heart will be shown in the centre of the screen, should the Survivor be within the Terror Radius or the Lullaby Radius, informing the Player that they might want to adjust their camera to make the Survivor's chest and heart visible again.

Lullaby Indicator

Should a Survivor be inside the Lullaby Radius of a Killer, a swirling red haze will be shown in their chest instead of a beating heart.
Just as auditory Lullabies are non-directional and do not allow Survivors to gauge the Killer's distance from them, the haze does not change in its intensity either.

Undetectable Mechanic

There are several Unlockables, as well as Killer Powers, that can temporarily cloak a Killer's Terror Radius, all of which apply the Undetectable Status Effect.
The list below only lists Killer Powers or Add-ons of said Power that grant Undetectable, as Perks doing so allow any Killer to become Undetectable.

The Wraith cloaking himself and entering the Spirit World.
The Hillbilly using Filthy Slippers
The Nurse using "Bad Man's" Last Breath
The Shape while remaining in Evil Within I
The Hag using Grandma's Heart
The Huntress using Wooden Fox
The Pig crouching
The Ghost Face using Night Shroud
The Demogorgon after traversing the Upside Down
The Deathslinger using Hellshire Iron
The Executioner using Obsidian Goblet
The Blight using Vigo's Journal
The Twins using Silencing Cloth
The Nemesis using Serotonin Injector
The Cenobite using Chatterer's Tooth
The Artist using Iridescent Feather
The Onryō while Demanifested
The Dredge during Nightfall
The Mastermind while using Dark Sunglasses
The Knight using Town Watch's Torch
The Skull Merchant after deploying her Drones.
The Singularity when controlling his Biopods
The Xenomorph when traversing its Tunnels
The Lich using Cloak of Invisibility
The Dark Lord in Bat Form.

List of Terror Radius and Lullabies

Yellow: Standard Terror Radius of 32 metres
Red: Standard Terror Radius of 24 metres
Blue: Non-standard Terror Radius
Magenta: Lullaby Radius
Orange: Standard Movement Speed of 4.6 m/s
Purple: Standard Movement Speed of 4.4 m/s
Green: Non-standard Movement Speed

Killer	Radius Type	Range	Movement Speed	Terror Radius / Chase Music Audio	Lullaby Audio	Previous Terror Radius / Chase Music Audio
Trapper	Terror Radius	32 metres	4.6 m/s	Themes 01-06 / Themes 01-03	No Lullaby	No previous Terror Radius / Chase Music
Wraith	Terror Radius	32 metres	4.6 m/s	Themes 01-06 / Themes 01-03
Hillbilly	Terror Radius	32 metres	4.6 m/s
Nurse	Terror Radius	32 metres	3.85 m/s
Shape	Terror Radius	6 metres (Evil Within I)	4.4 m/s			(Unused version from the Patch 1.2.0 QA Test Build)
		16 metres (Evil Within II)	4.6 m/s
		32 metres (Evil Within III)	4.6 m/s
Hag	Terror Radius	24 metres	4.4 m/s			No previous Terror Radius / Chase Music
Doctor	Terror Radius	32 metres	4.6 m/s			(PTB Version)
Huntress	Terror Radius	20 metres	4.4 m/s	Themes 01-06 / Themes 01-03		No previous Terror Radius / Chase Music
Huntress	Lullaby (Hum)	45 metres	4.4 m/s
Cannibal	Terror Radius	32 metres	4.6 m/s		No Lullaby
Nightmare	Lullaby (Nursery Rhyme)	32 metres (Dream World)	4.6 m/s
Nightmare	Terror Radius	32 metres	4.6 m/s
Pig	Terror Radius	32 metres	4.6 m/s		No Lullaby
Clown	Terror Radius	32 metres	4.6 m/s
Spirit	Terror Radius	24 metres	4.4 m/s
Legion	Terror Radius	32 metres	4.6 m/s
Legion	Terror Radius	40 metres (Feral Frenzy)	4.6 m/s
Plague	Terror Radius	32 metres	4.6 m/s	Themes 01-06 / Themes 01-03
Ghost Face	Terror Radius	32 metres	4.6 m/s			(5.7.0)
Demogorgon	Terror Radius	32 metres	4.6 m/s			(PTB Version 1) (PTB Version 2)
Oni	Terror Radius	32 metres	4.6 m/s			(PTB Version)
Deathslinger	Terror Radius	32 metres	4.4 m/s			No previous Terror Radius / Chase Music
Executioner	Terror Radius	32 metres	4.6 m/s			(PTB Version)
Blight	Terror Radius	32 metres	4.6 m/s			(Version Before Patch 4.4.0)
Twins	Terror Radius	32 metres (Charlotte)	4.6 m/s			No previous Terror Radius / Chase Music
	Lullaby (Shriek)	12 metres (Victor, idle)
		14 metres (Victor, attached)
		18 metres (Victor, controlled)
Trickster	Terror Radius	32 metres	4.6 m/s
Trickster	Lullaby (Melody)	44 metres	4.6 m/s
Nemesis	Terror Radius	32 metres	4.6 m/s		No Lullaby
Cenobite	Terror Radius	32 metres	4.6 m/s
Artist	Terror Radius	32 metres	4.6 m/s
Onryō	Terror Radius	24 metres	4.6 m/s
Onryō	Lullaby	24 metres (Otherworld)	4.6 m/s
Dredge	Terror Radius	32 metres	4.6 m/s		No Lullaby
Mastermind	Terror Radius	40 metres	4.6 m/s
Knight	Terror Radius	32 metres	4.6 m/s
Skull Merchant	Terror Radius	32 metres	4.6 m/s			(Version Before Patch 7.3.0)
Singularity	Terror Radius	32 metres	4.6 m/s			(PTB Version)
Xenomorph	Terror Radius	32 metres	4.6 m/s			(PTB Version)
Xenomorph	Terror Radius	24 metres (Crawler Mode)	4.6 m/s			(PTB Version)
Good Guy	Terror Radius	32 metres	4.4 m/s			No previous Terror Radius / Chase Music
Lich	Terror Radius	32 metres	4.6 m/s
Dark Lord	Terror Radius	32 metres	4.6 m/s

Terror Radius Themes 01-06

Theme 01
Theme 02
Theme 03
Theme 04
Theme 05
Theme 06

Chase Music Themes 01-03

Theme 01
Theme 02
Theme 03

Unlockables

Add-ons

	"Calm" - Class I	An ECT procedure using a deep wavelength that soothes various mental illnesses. With Carter's Spark as its source, this procedure can cause mild anxiety in the patient. Increases your Terror Radius by +4 metres while Static Blast is ready to be used. Reduces your Terror Radius by -4 metres while Static Blast is on cool-down. Survivors affected by Madness suffer from the Affliction of Calm: Madness II: Survivors intermittently hear a distant Illusionary Terror Radius. Madness III: Survivors constantly hear a distant Illusionary Terror Radius.
	"The Beast" - Soot	The Kunwulju symbol, representing the Realm of Fear, is finger-drawn out of soot on the body of the Bell. Your Terror Radius is no longer suppressed when Cloaked. Grants +100 % bonus Bloodpoints for Stalking and Surprise Attack Score Events.
	"The Ghost" - Soot	The Khugwemuu symbol, representing the Spirit World, is finger-drawn out of soot on the body of the Bell. Your Terror Radius and Red Stain are suppressed for another 6 seconds after uncloaking.
	Soured Milk	A metal bottle filled with milk that has since soured. Loud as Victor could be, he quieted down when presented with his meal. Increases the Shriek radius of Victor by +2 metres.
	Strobing Light	This description is based on the changes announced for or featured in the upcoming Patch 8.0.0 With the right training, it can be used to make people more suggestible. Reduces your Terror Radius by -8 metres, when Hidey-Ho Mode is on cool-down.
	"Calm" - Class II	A risky ECT procedure using a deep wavelength that soothes various mental illnesses. With Carter's Spark as its source, this procedure can cause moderate anxiety in the patient. Increases your Terror Radius by +6 metres while Static Blast is ready to be used. Reduces your Terror Radius by -6 metres while Static Blast is on cool-down. Survivors affected by Madness suffer from the Affliction of Calm: Madness II: Survivors intermittently hear a distant Illusionary Terror Radius. Madness III: Survivors constantly hear a distant Illusionary Terror Radius.
	"Discipline" - Class II	Project Awakening ECT procedure for disciplinary action which uses a fixed dose at high voltage. Can cause a state of moderate paranoia in the patient. Reduces the Detonation delay of the Shock Therapy Attack by -0.1 seconds. Survivors affected by Madness suffer from the Affliction of Discipline: Madness II: During a Chase, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. This effect lingers for 6 seconds after the Chase ends. Madness III: In any situation, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. You share into your patients' Madness and can see the Illusionary Red Stain. "We re-educate our patients with the greatest care." — Léry's Memorial Institute
	Adaptive Lighting	This description is based on the changes announced for or featured in the upcoming Patch 6.6.0 The Drone takes account of the surrounding area and casts lights in a bewildering manner that obscures movement. Increases the duration of the Undetectable Status Effect by +20 %.
	Cat's Eye	An eyeball that belonged to a cat eaten by the starving Deshayes family. Victor hid it from his mother, using it as a toy. Suppresses all noise made by Victor while holding a Pounce.
	Dead Rabbit	A grey rabbit which has been opened from neck to tail. Reduces your Terror Radius by -25 % while in Evil Within II. Increases your Terror Radius by +25 % while in Evil Within III.
	Madeleine's Glove	A glove once owned by The Twins' mother. During desperate times, it was held over Victor's mouth to keep him from making a peep. Increases the Shriek radius of Victor by +4 metres.
	Marshal's Badge	A silver badge taken from the corpse of a lawman in Arizona Territory who interfered with the Hellshire Gang's bounties. Reduces your Terror Radius by -4 metres during Aim Down Sights. "Get your prayers in, you'll be swinging by noon." — Caleb Quinn
	Moonstone Necklace	This description is based on the changes announced for or featured in the upcoming Patch 8.2.0 A simple necklace by day, but its power comes to life in the dark. Reduces the Terror Radius in Vampire and Wolf Form by -4 metres.
	Ultrasonic Sensor	This description is based on the changes announced for or featured in the upcoming Patch 8.1.0 A limitation of organic hearing is a limited aural spectrum. Expanding that range is like gaining an entirely new sense. Exiting a Biopod within 2 seconds of afflicting a Survivor with Temporal Slipstream reduces your Terror Radius by -12 metres for 12 seconds.
	"Discipline" - Class III	This description is based on the changes announced for or featured in the upcoming Patch 7.6.0 Project Awakening ECT procedure for disciplinary action which uses a fixed dose at very high voltage. Can cause a state of serious paranoia in the patient. Reduces the Detonation delay of the Shock Therapy Attack by -0.15 seconds. Survivors affected by Madness suffer from the Affliction of Discipline: Madness II: During a Chase, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. This effect lingers for 6 seconds after the Chase ends. Madness III: In any situation, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. You share into your patients' Madness and can see the Illusionary Red Stain. "Respect of our patients is at the core of our principles." — Léry's Memorial Institute
	Cloak of Elvenkind	This description is based on the changes announced for or featured in the upcoming Patch 8.0.0 Its colours are constantly shifting, making you more difficult to detect from afar. Reduces the Terror Radius by -8 metres while the Fly Spell is active. This effect lingers for 6 seconds.
	Hyperawareness Spray	This description is based on the changes announced for or featured in the upcoming Patch 7.0.0 Used by crew members during long shifts to avoid lapses in focus. Side effects of overuse include paranoia and, in extreme cases, hallucination. Causes all Slipstreamed Survivors to hear a fake nearby Terror Radius.
	Incensed Ointment	A dark waxy paste, laced with cedar sap that diffuses a sweet and earthy aroma. Applied directly on infected skin. Ingesting Corruption causes all Survivors in your Terror Radius to scream and reveal their locations to you.
	Joey's Mix Tape	A mix of bangin' tracks and slammin' beats for chillaxin' when life's a bitch. Survivors suffer from the Haemorrhage Status Effect until fully healed after mending themselves. Unlocks an additional sound layer in your Terror Radius, enhancing it musically. Joey's Mix Tape can be combined with any other Mix Tape Add-on to unlock multiple sound layer combos.
	Knife Belt Clip	A perfect belt clip to scout carry your blade discreetly. No one knows what you are planning to do tonight. Reduces your Terror Radius by -12 metres when Crouched.
	Serotonin Injector	A hormone that slightly relaxes the user for when stealth is required. Grants the Undetectable Status Effect for 15 seconds, after a Zombie is disintegrated by any means.
	Shop Lubricant	An oil specifically formulated for Chainsaws. A special additive prevents oil throw off. The Auras of Survivors downed by Bubba's Chainsaw, if no other Survivors were within the Terror Radius, are hidden to other Survivors for 20 seconds.
	Silk Pillow	This description is based on the changes announced for or featured in the upcoming Patch 7.4.0 For when you want to smother your target with silky-smooth softness. Permanently reduces your Terror Radius by -6 metres. Increases the Charge time of Slice & Dice to 150 % of its default duration.
	Susie's Mix Tape	A fast and thrilling mix tape with energising songs with break-neck beats. Increases the Detection radius of Killer Instinct by +20 metres. Unlocks an additional sound layer in your Terror Radius, enhancing it musically. Susie's Mix Tape can be combined with any other Mix Tape Add-on to unlock multiple sound layer combos.
	Town Watch's Torch	This description is based on the changes announced for or featured in the upcoming Patch 8.1.0 Upon breaching a village, the first thing they would extinguish was the torches, and with them, hope. Grants the Undetectable Status Effect during a Hunt.
	Violet Waxcap	A dark fleshed mushroom from the Upside Down that allows The Demogorgon to telepathically distort the senses in its prey. Increases the duration of the Undetectable Status Effect by +1 second.
	Well Water	Water from the well where Sadako was left to die. Murky and black, it obscures everything around it. Increases the duration of the Undetectable Status Effect by +2 seconds after Manifesting by any means.
	"Bad Man's" Last Breath	A powerful last breath snatched from the asylum patient known as the "Bad Man". In the hands of The Nurse, it jolts with intensity. Hitting Survivors with a Special Attack grants the Undetectable Status Effect for 25 seconds. "Bad Man's" Last Breath" has a cool-down of 45 seconds.
	"Calm" - Carter's Notes	An experimental version of the ECT procedure annotated by Doctor Herman Carter himself. Uses a deep wavelength that soothes various mental illnesses. With Carter's Spark as its source, this procedure causes uncontrollable fear and anxiety in the patient. Increases your Terror Radius by +8 metres while Static Blast is ready to be used. Reduces your Terror Radius by -8 metres while Static Blast is on cool-down. Survivors affected by Madness suffer from the Affliction of Calm: Madness II: Survivors intermittently hear a distant Illusionary Terror Radius. Madness III: Survivors constantly hear a distant Illusionary Terror Radius. "Higher quality seizures trigger catatonia. At least it gives me peace* for the time it lasts." — Herman Carter*
	"Discipline" - Carter's Notes	This description is based on the changes announced for or featured in the upcoming Patch 7.6.0 Project Awakening ECT procedure for disciplinary action, annotated by Doctor Herman Carter himself. The intolerably high voltage leaves the patient in a severe state of paranoia. Reduces the Detonation delay of the Shock Therapy Attack by -0.2 seconds. Survivors affected by Madness suffer from the Affliction of Discipline: Madness II: During a Chase, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. This effect lingers for 6 seconds after the Chase ends. Madness III: In any situation, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. You share into your patients' Madness and can see the Illusionary Red Stain. "To avoid relapse from our most tenacious subjects, use maximum* levels when proceeding with disciplinary actions." — Herman Carter*
	Apex Muffler	This description is based on the changes announced for or featured in the upcoming Patch 7.5.0 A masterfully crafted chainsaw muffler that outperforms all others. Silences the Chainsaw for all Survivors outside of the Terror Radius.
	Cat Carrier	This description is based on the changes announced for or featured in the upcoming Patch 7.2.0 Saving the cat is a noble goal. It's also very distracting. Grants the Undetectable Status Effect for 30 seconds, when a Remote Flame Turret knocks you out of Crawler Mode.
	Chatterer's Tooth	A fragment from a Cenobite whose mouth chatters endlessly. This tooth, having broken from his jaw, is finally silent. Grants the ability to see the Aura of the Lament Configuration. Picking up the Lament Configuration deactivates an on-going Chain Hunt and grants the Undetectable Status Effect for 25 seconds.
	Dark Sunglasses	Glasses enhanced with AR that grant the wearer an invaluable advantage on the battlefield. Grants the Undetectable Status Effect for 20 seconds whenever a Survivors reaches Critical Infection.
	Drop of Perfume	One of the few luxuries Madeleine escaped her past life with. It has a pleasant, disarming scent. Survivors suffer from the Oblivious Status Effect within Victor's Shriek range when controlling Charlotte. "Beware the deceit of witches, for they exploit the goodness in men's hearts." — A History of Witches and Demons, 1602
	Filthy Slippers	This description is based on the changes announced for or featured in the upcoming Patch 7.5.0 Max sometimes struggled to hear his mother's footfalls. Gain the Undetectable Status Effect until you stop sprinting after maintaining a Chainsaw Sprint for at least 2 seconds.
	Frank's Mix Tape	Never go on a kill mission without your tunes. A track list of massive distortions and loud percussion that stabs at your eardrums. During Feral Frenzy, you benefit from the following effects: Pauses the Power Gauge depletion while performing the Break or Damage action. Increases the Action speed for damaging Generators by +20 %. Increases the Action speed for breaking Breakable Walls by +30 %. Unlocks an additional sound layer in your Terror Radius, enhancing it musically. Frank's Mix Tape can be combined with any other Mix Tape Add-on to unlock multiple sound layer combos.
	Gold Creek Whiskey	Warm comfort in a bottle that quelled Caleb's anger and slowed his step. Reduces your Terror Radius by -8 metres during Aim Down Sights. "A smooth taste for the rugged frontier." — Gold Creek Advertisement, 1876
	Grandma's Heart	The cold heart of the cannibal village elder. The trapped life essence within unlocks tremendous potential in The Hag's power. Whenever Survivors trigger Phantasm Traps, you benefit from the following effects for their tripped duration: Suppresses your Terror Radius. Doubles the range of the Fake Terror Radius emitted by the Mud Phantasms to 16 metres. "Bring me another slice of the girl." — Grandma
	Pile of Nails	This description is based on the changes announced for or featured in the upcoming Patch 8.0.0 It is a lot easier to stay hidden when your target is worried about a pile of nails flying at their head. Grants the Undetectable Status Effect for 3 seconds after manually ending Hidey-Ho Mode.
	Prayer Beads Bracelet	THIS ADD-ON WAS DECOMMISSIONED (This Unlockable was decommissioned in the past and no longer exists in the current Game.) A powerful bracelet that reads a sacred mantra. Causes all Survivors outside of your Terror Radius to hear the audio cue of the Phase-Walk.
	Ship Figurehead	This description is based on the changes announced for or featured in the upcoming Patch 8.4.0 A trophy torn from the bow of another ship. The Terror Radius of The Houndmaster changes based on the proximity of The Dog: Increases the Terror Radius by +8 metres while it is following. Reduces the Terror Radius by -8 metres while it is away.
	Vermilion Webcap	A bright red poisonous mushroom from the Upside Down. Increases the duration of the Undetectable Status Effect by +3 seconds. "Still experimenting with this specimen, so far our results are inconsistent." — Hawkins National Laboratory
	Vigo's Journal	The journal of a man who claimed to have returned from The Void. The knowledge within has practical applications. Grants the Undetectable Status Effect during a Rush. "In a wasteland of forgotten dreams and endless routine, the man with a way out is God." — Talbot Grimes
	Wooden Fox	Roughly carved, this fox statuette is no more than a few inches. A reminder that stealth and cunning is as effective as raw power. Grants the Undetectable Status Effect after reloading at Lockers for 30 seconds.
	Fuming Mix Tape	Dark beats, violent shreds and unfathomable vocals from another world fill the mind with a vibrating sixth sense. During Feral Frenzy, the intensity of Generator Auras reveals their current Repair progress and incomplete Generators start regressing. Unlocks an additional sound layer in your Terror Radius, enhancing it musically. The Fuming Mix Tape can be combined with any other Mix Tape Add-on to unlock multiple sound layer combos.
	Hellshire Iron	The Hellshire Gang's branding iron. Despite folklore, it never made its mark on new initiates, instead having been used to brand particularly quarrelsome bounties. Grants the Undetectable Status Effect while a Survivor is speared by The Redeemer. This effect lingers for 10 seconds. "Hellshire Gang: Justice Seekers or Outlaws?" — Glenvale Gazette headline
	Iridescent Feather	A glass-like feather moulded from The Fog itself. Simple as it may be, it is a symbol of those who watch over Carmina. Grants the Undetectable Status Effect when Birds of Torment is on Cool-down and you hold no Dire Crows. Reduces the number of summonable Dire Crows by -1. "They saved me when I could not save myself." — Carmina Mora
	Iridescent King	A glass-like king chess piece moulded from The Fog itself. The Entity's trace reverberating within can break the most powerful minds. Survivors affected by Madness suffer simultaneously from the Afflictions of Calm, Discipline, Order, and Restraint: Survivors intermittently hear a distant Illusionary Terror Radius. During a Chase, Survivors perceive an Illusionary Red Stain and Terror Radius, as if you were constantly right behind them. Madness II: This effect lingers for 6 seconds after the Chase ends. Madness III: This effect is constant, regardless of whether the Survivors are being chased or not. Broken Pallets are randomly replaced by dropped or upright Illusionary Pallets, which persist until approached by Survivors. New Illusionary Pallets are generated every 20 seconds. Increases the duration of Illusionary Doctors by +6 seconds. You share into your patients' Madness and can see the Illusionary Doctors, Red Stain, and Pallets. "Gazing into the iridescent glass is plunging one's self into madness." — Herman Carter
	Iridescent OSS Report	This description is based on the changes announced for or featured in the upcoming Patch 7.6.0 The report was redacted to the point of being meaningless. But still, theorists tried to extract meaning from it. Reduces the Cool-down duration of the Teleport ability by -5 seconds. Increases the lifetime of the Decoy by +10 seconds. Imbues Decoys with a Terror Radius and a Red Stain.
	Iridescent Unpublished Manuscript	This description is based on the changes announced for or featured in the upcoming Patch 6.6.0 Before he disappeared, Adriana's father had started a newer, darker manga: Sonhadores Sombrios. Whenever a Drone enters the Disabled State, the following effects apply for 15 seconds: Causes the disabled Drone to emit a fake Terror Radius of 32 metres. Grants the Undetectable Status Effect. "When evil is on the loose, it cannot escape from Adi Valente!" — Quote on the cover of Adi Valente #1
	Iridescent Wheel Handle	This description is based on the changes announced for or featured in the upcoming Patch 8.4.0 Once used to guide a greast vessel across the open seas, its remnants now serve as a memory of times past. Increases the Linger duration of The Dog at the Target Location of the Search Command by +20 %. Grants the Undetectable Status Effect while The Dog fulfils the Search Command. Touching the Search Path as The Houndmaster immediately removes the Status Effect. "I fear no obstacle, be it man or storm." — Portia Maye
	Obsidian Goblet	An ancient looking goblet carved from pure obsidian. Grants the Undetectable Status Effect while standing on Torment Trails in the environment. "Forgive me for waking you. But without you, I just can't go on." — James Sunderland
	Red Moss	A psychedelic moss that grows on tree barks in the Upside Down. Increases the duration of the Undetectable Status Effect by +8 seconds. Suppresses all noise made while emerging from Portals. Increases the time to emerge from Portals by +15 %. "Consuming its leaf enhances athletic performance and causes euphoria." — Hawkins National Laboratory
	Silencing Cloth	This description is based on the changes announced for or featured in the upcoming Patch 7.7.0 A coarse strip of cloth that a five-year-old Charlotte would put in her mouth. Stopped her from screaming when witch hunters were nearby. After waking from her Dormant State, Charlotte is granted the Undetectable Status Effect for 20 seconds. "I don't like this game anymore, Mother..." — Charlotte Deshayes

Perks

	Agitation	You get excited in anticipation of hooking your prey. When carrying a Survivor, you benefit from the following effects: Increases your Movement speed by 6/12/18 %. Increases your Terror Radius by +12 metres. "At some point, the excitement of hooking one of us becomes more important than the desire to kill us."
	Beast of Prey	Your lust for a kill is so intense that your connection with The Entity is momentarily lost, making you totally unpredictable. Upon gaining the Bloodlust Status Effect, Beast of Prey activates: Grants the Undetectable Status Effect for as long as Bloodlust is active. Beast of Prey grants 30/40/50 % bonus Bloodpoints for actions in the Hunter Category. The bonus Bloodpoints are only awarded during the Trial. "Where did she go?"
	Coulrophobia	This description is based on the changes announced for or featured in the upcoming Patch 6.1.0 Even those without a fear of clowns know to be terrified of you. For all Survivors within your Terror Radius, the following effects apply: Reduces their Healing speed by 30/40/50 %. Increases the Rotation speed of Healing Skill Checks by +50 %.
	Dark Devotion	This description is based on the changes announced for or featured in the upcoming Patch 6.1.0 The display of your Powers creates a whirlwind of panic that spreads throughout the land. Whenever the Obsession loses a Health State by any means and thus enters the Injured State, Dark Devotion activates: Your Terror Radius transfers to the Obsession for 20/25/30 seconds, and its radius is set to 32 metres. Grants the Undetectable Status Effect for the same duration. The Obsession with your transferred Terror Radius is also considered to be 'inside the Terror Radius' for other purposes. You can only be obsessed* with one Survivor at a time.* "And terror shall take hold of a defiant non-believer, who shall falsely announce my arrival." — (The Tablet of Adiris, 48.9)
	Dissolution	Everything turns to dust. It is as inescapable as the coming of the night. After 3 seconds of injuring a Survivor by any means, Dissolution activates for 12/16/20 seconds: Instantly breaks the next Pallet that Survivor performs a Fast Vault across while inside your Terror Radius. "The Garden shall be a place of perfect Joy; through Joy, nothing shall stand in our way." — Otto Stamper
	Distressing	Your horrifying emanation strikes at a supernaturally long distance. Increases your Terror Radius by 22/24/26 % Grants 100 % bonus Bloodpoints for all actions in the Deviousness Category.
	Diversion	This description is based on the changes announced for or featured in the upcoming Patch 8.2.0 Diversion charges while inside the Terror Radius without being chased by the Killer. After charging for 30/25/20 seconds, it activates: Press the Active Ability button while crouched and motionless to throw a pebble in the direction you are facing, creating a distraction for the Killer 20 metres away from your location: Triggers a Loud Noise Notification. Creates fake Scratch Marks. Diversion deactivates after use and resets its timer. "There's what is easy and then there's what is right. If you confuse the two, there's no telling what you become." — Adam Francis
	Furtive Chase	This description is based on the changes announced for or featured in the upcoming Patch 7.3.0 You lurk in the shadows, eliminating your victims one by one. Each time you hook your Obsession, you benefit from the following effects for 14/16/18 seconds: Grants the Undetectable Status Effect. Grants a +5 % Haste Status Effect. Whenever the Obsession is rescued from a Hook, their rescuer will become the new Obsession. You can only be obsessed* with one Survivor at a time.* "You have no idea what I have planned for you. It'll be in the news for weeks. I'll make sure of that." — The Ghost Face
	Hex: Face the Darkness	This description is based on the changes announced for or featured in the upcoming Patch 6.4.0 You make an example of one of your victims, forcing their allies to become awed by your power. Whenever you injure a Survivor by any means, if there is still a Dull Totem remaining on the Map, Hex: Face the Darkness activates and lights it, cursing that Survivor: Causes all other Survivors to scream every 35/30/25 seconds, if they are outside of the Terror Radius, revealing their Auras for 2 seconds each time. Hex: Face the Darkness deactivates once the Cursed Survivor either enters the Dying State or is fully healed, which extinguishes the Totem. Hex: Face the Darkness is disabled for the remainder of the Trial, if a Survivor manages to cleanse its Hex Totem. "I shall make an example of one. These mewling worms will never know peace." — Tarhos Kovács
	Infectious Fright	The cries of the unfaithful make your heart leap. Whenever a Survivor is put into the Dying State by any means, all other Survivors within your Terror Radius will scream and reveal their current location to you for 4/5/6 seconds. "Horror overcomes the heart of infidels who cry at the feet of the fallen." — (Hymn of Praise, 11.4)
	Insidious	Unlocks the stealth ability. Grants the Undetectable Status Effect after standing still for 4/3/2 seconds. This effect lasts until you start moving again.
	Invocation: Treacherous Crows	This description is based on the changes announced for or featured in the upcoming Patch 8.4.0 One with arcane knowledge has no reason to fear those watchful birds. When in the Basement near the circle, press the Active Ability button to begin the Invocation, which takes 60 seconds to complete. During an Invocation, your Aura is revealed to all other Survivors and they can join in, accelerating the process by +100 %, if they too have an Invocation Perk equipped, or by +50 %, if they have not. Once the Invocation is completed, the following effects apply: Whenever the Killer scares a Crow while a Survivor is inside their Terror Radius, their Aura is revealed to all Survivors for 1/1.5/2 seconds. You automatically enter the Injured State from any previous Health State, and suffer from the Broken Status Effect for the remainder of the Trial. Completing an Invocation disables all Invocation Perks for the remainder of the Trial for all Survivors. "Remember your training. They taught you all about the crows." — Taurie Cain
	Machine Learning	This description is based on the changes announced for or featured in the upcoming Patch 8.3.2 Free from your shackles, you are born anew and prepared to eliminate your creators. After performing the Damage Generator action, Machine Learning activates: Causes that Generator to become a Compromised Generator. Damaging another Generator transfers the state to it instead. The Aura of the Compromised Generator is highlighted to you in yellow until it is completed. Once the Compromised Generator is completed, you benefit from the following effects for 35/40/45 seconds: Undetectable Status Effect +10 % Haste Status Effect Machine Learning deactivates after use. "YOU WILL HOLD NO DOMINION OVER ME!" — HUX-A7-13
	Monitor & Abuse	This description is based on the changes announced for or featured in the upcoming Patch 7.5.0 Meticulous in your approach, terrifying in your application. Increases the base value of your Terror Radius by 6/7/8 metres for the entire Trial. Whenever you are not in a Chase with a Survivor, the following effect applies: Reduces your Terror Radius by 12/14/16 metres. "It's time for your treatment!" — Herman Carter, The Doctor
	Overwhelming Presence	Just knowing you are near is enough to disturb your victims. Survivors within your Terror Radius suffer from inefficiency: When using an Item, its Depletion rate is increased by 80/90/100 %. "Shit!! I dropped the gauze!"
	Phantom Fear	This description is based on the changes announced for or featured in the upcoming Patch 9.0.0 Unable to retrieve the Perk description or unable to display it. It can be added to the Datatable/Loadout. Otherwise Please contact Jouki
	Scene Partner	This description is based on the changes announced for or featured in the upcoming Patch 7.1.0 You lock in with your co-star, engaging with and reacting to each other on a higher level. Whenever you are inside the Terror Radius, Scene Partner activates: Looking at the Killer causes you to scream, which reveals their Aura for 3/4/5 seconds. There is a chance of 50 % that you will scream again, extending the Aura-reveal duration by another 2 seconds. Scene Partner has a cool-down of 60 seconds. "This is not in the script!" — Nicolas Cage
	Septic Touch	The Land of the Shadows subsumes all. Healing only delays the inevitable. Whenever a Survivor performs a Healing action while they are inside your Terror Radius, that Survivor suffers from the Blindness and Exhausted Status Effects These effects linger for 6/8/10 seconds after the Healing action is interrupted by any means. "Do not admit to fear, or pain, or doubt. These are the seeds from which darkness grows." — Otto Stamper
	Stake Out	Getting close to the Killer fills you with determination. Every 15 seconds you are within the Killer's Terror Radius, while not being chased, Stake Out gains 1 Token, up to a maximum of 2/3/4 Tokens. When Stake Out has at least 1 Token, Good Skill Checks consume 1 Token and are considered Great Skill Checks, granting an additional Progression bonus of +1 %. Great Skill Checks do not consume any Tokens. "I had you, I had you on your knees. You're runnin' scared because we had you. We're gonna close this case!" — Detective David Tapp
	Starstruck	Your unmatched showmanship dazzles all. When carrying a Survivor, Starstruck activates: Survivors suffer from the Exposed Status Effect while in your Terror Radius. The Status Effect lingers for 26/28/30 seconds after leaving your Terror Radius. After hooking or dropping the carried Survivor, Starstruck deactivates: The Status Effect persists for 26/28/30 seconds for any Survivor inside your Terror Radius at that moment. Starstruck has a cool-down of 60 seconds once the Survivor is no longer being carried. "Enjoy this moment, few get so close." — Ji-Woon Hak
	Tinkerer	This description is based on the changes announced for or featured in the upcoming Patch 6.1.0 Whenever a Generator is repaired to 70 %, you benefit from the following effects: Triggers a Loud Noise Notification for that Generator, revealing its location. Grants the Undetectable Status Effect for the next 12/14/16 seconds. Tinkerer can only trigger once per Generator per Trial. "The Hillbilly makes impressive tools out of scraps. Tools aimed at maiming us in creative ways." — Notebook
	Trail of Torment	This description is based on the changes announced for or featured in the upcoming Patch 8.1.0 You guide your victims along a path of pain and punishment. Performing the Damage Generator action on a Generator activates Trail of Torment: Grants the Undetectable Status Effect until the Generator stops regressing. The Aura of the damaged Generator is revealed to all Survivors in yellow. Trail of Torment has a cool-down of 60/45/30 seconds.
	Unforeseen	This description is based on the changes announced for or featured in the upcoming Patch 7.6.0 Terror takes many forms and whispers devastating lies in its victims' ears. Performing the Damage Generator action on a Generator applies Unforeseen for 22/26/30 seconds: Transfers your Terror Radius to the damaged Generator and sets its range to 32 metres. Grants the Undetectable Status Effect. "Mom, if you find this, I'm sorry..." — Final Journal Entry, 07/12/1991
	Unnerving Presence	Your presence alone instils great fear. Survivors repairing or healing within your Terror Radius suffer from the following effects: Increases the Trigger odds of Skill Check by 10 %. Decreases the Success zone of Skill Checks by 40/50/60 %. "Its presence befalls us."

Calculations

The following table lists several examples of resulting Terror Radii when using Unlockables that affect it in some way.
It should be noted that not all 4.6 m/s or 4.4 m/s share the same respective Terror Radius, this table acts solely as a generic example:

Unlockable	Modifier	Standard 4.6 m/s Killer	Standard 4.4 m/s Killer
no Unlockables	-	32 metres	24 metres

Agitation	+12 m (Carrying)	44 metres	36 metres

Distressing	+22 %	39.04 metres	29.28 metres
	+24 %	39.68 metres	29.76 metres
	+26 %	40.32 metres	30.24 metres

Monitor & Abuse*	-16 m (no Chase)	24 metres	16 metres
Monitor & Abuse*	default (in Chase)	40 metres	32 metres

Change Log

Patch 1.8.1

Killer Nerf: increased The Nightmare's Terror Radius to 24 metres from formerly 16 metres.

Patch 1.9.3

Killer Buff: reduced The Hag's Terror Radius to 24 metres from formerly 28 metres.

Patch 2.5.0

Killer Nerf: increased The Pig's Terror Radius to 32 metres from formerly 28 metres.

Patch 2.6.0

Quality of Life: the intensity of the Terror Radius is now also scaled based on the vertical distance, in addition to the horizontal distance.

Patch 2.7.0

Killer Nerf: increased The Legion's Terror Radius to 32 metres from formerly 24 metres.

Patch 3.5.0

Change: provided The Doctor with a unique Terror Radius and Chase Music.

Patch 4.1.0

Change: provided The Hillbilly with a unique Terror Radius and Chase Music.

Patch 4.4.0

Change: The Blight now features a change to his Terror Radius Music. This change makes his nearby layer more distinct than the approaching layer as previously, the transitions between the two layers are too subtle.

Patch 4.5.0

Change: provided The Clown with a unique Terror Radius and Chase Music.

Patch 5.3.0

Change: provided The Spirit with a unique Terror Radius and Chase Music.
Killer Nerf: increased The Deathslinger's Terror Radius to 32 metres from formerly 24 metres.

Patch 5.7.0

Change: provided The Legion and The Ghost Face with a unique Terror Radius and Chase Music.

Patch 5.7.1

Change: reduced the volume of The Ghost Face's Terror Radius and Chase Music due to Community complaints.

Patch 5.7.2

Change: replaced The Ghost Face's Terror Radius and Chase Music with a completely new theme to address the previously mentioned complaints.
- The change only replaced Layers 3 and 4, which represent closest proximity and the Chase.

Patch 6.1.0

Change: replaced The Ghost Face's Terror Radius and Chase Music again.
- The change only replaced Layers 3 and 4, which represent closest proximity and the Chase.

Patch 6.3.0

Change: provided The Hag with a unique Terror Radius and Chase Music.

Patch 6.5.0

Change: provided The Nurse with a unique Terror Radius and Chase Music.

Patch 6.7.0

QoL: implemented an option to enable a visual representation of the Terror Radius.

Patch 7.3.0

Change: replaced The Skull Merchant's Chase Music with a different theme to address the Community complaints.
- The change only replaced Layer 4, which represents the Chase.

Patch 7.4.0

Change: increased The Trickster's Terror Radius to 32 metres from formerly 24 metres.
- This change is not listed as a nerf, because The Trickster also received an increase to his default Movement speed from 4.4 m/s to 4.6 m/s alongside it, warranting the increased Terror Radius.

Patch 8.1.0

Reversal (undocumented): reverted The Lich's Layer 3 Terror Radius to be the same as it was in the PTB.

Trivia

Unlockables that affect the Terror Radius by a percentage tend to apply that on top of the base Terror Radius, ignoring other Unlockables that affect it by a concrete numerical value.
Survivors who are hooked do not hear the Terror Radius.

Old Terror Radii

Originally, both The Demogorgon and The Oni had a unique Chase Music from the Killer's POV. Survivors would still hear the Killer's normal Terror Radii near the Killer and in Chase. These themes were removed a while later in an unspecified patch, and replaced by their default chase themes.
- The Oni's unique Chase Music was his PTB Chase Music while the Demogorgon's Chase Music was its current nearby layer.

References

↑ https://forums.bhvr.com/dead-by-daylight/discussion/412292/lullaby-s-aren-t-suppose-to-be-directional-feedback Lullaby’s aren’t suppose to be directional? Feedback. Post on the Dead by Daylight forums confirming Onryō's directional Lullaby to be intentional.

[1] ttps://forums.bhvr.com/dead-by-daylight/discussion/412292/lullaby-s-aren-t-suppose-to-be-directional-feedback Lullaby’s aren’t suppose to be directional? Feedback. Post on the Dead by Daylight forums confirming Onryō's directional Lullaby to be intentional.

[1]