The Filth is a Lesser Husk introduced in the Tutorial as well as properly in 0-1: INTO THE FIRE, and is the first Husk-class enemy that the player encounters in ULTRAKILL.

Filth resemble emaciated, armless humanoids with faded green skin, dried blood on their body, and a lack of any facial features aside from a big, gaping mouth with a pair of sharp teeth.

Behavior

Filth will constantly chase their target and perform a Lunging Bite attack every 0.2 seconds when within 3 units of their target (4 units if not targeting the player).
If their target is above them, they will try to follow its movement on the ground, which opens up the opportunity to wipe them out.

They move at a maximum speed of 20 units/s with an acceleration of 30 units/s², and have a turn speed of 800 degrees/s.

Attacks

Bite

First, the Filth will ready a lunge while looking directly at its target, then lunge forward at 40 u/s while biting, dealing 30 damage to the player or 1 damage to enemies.
This attack can be parried.

Jump

The Filth will jump at its target at a speed of 25 u vertically, and twice its target's distance with a maximum of 25 u horizontally; dealing 30 damage to the player or 1 damage to enemies.
This attack cannot be parried, but will be cancelled if the Filth takes any damage.

If the Filth's target is the player, they will attempt to predict where it will be in 0.5 seconds after launching.

Strategy

Filth move very quickly on higher difficulties and can swarm the player if given the chance. However, they can usually be outran with sliding or dash jumps.
Due to their low health, most attacks are viable while fighting them, although piercing or explosive attacks are recommended since Filth typically spawn in swarms. Their small size and fast movement also make individual Filth harder to spot or kill with precision attacks, aiding them in getting close to an inattentive player.

Radiant Filth have a high 5x health multiplier to compensate for their low base health, making them similar in durability to normal Soldiers, and their 50% resistance to explosive damage puts their breakpoints for explosions on-par with normal Schisms. While any damaging explosion will instantly kill a normal Filth despite their resistance, radiant Filth will survive most non-igniting explosions from full health, save for the center of a Mindflayer's death explosion. However, since they do not block explosions like Soldiers nor resist firetick damage like Schisms, they will always take full burn damage from nonlethal igniting explosion hits, which will almost always finish them off, with the exception of a Cerberus projectile explosion's falloff range, which falls one firetick short of killing them.

The player may also choose to finish off burning radiant Filth with another attack for the + Finished Off style bonus, which yields 2.5x the style points of the basic + Fried bonus for letting them expire on their own. The 1.5x damage increase Filth take while burning stacks multiplicatively with their 1.5x damage increase while airborne, so most follow-up options will finish the job, even individual Shotgun pellets or Nailgun nails.

Knuckleblaster shockwaves are especially useful for normal Filth thanks to its efficient damage and ability to catch Filth in midair and from behind the player, and since arm attacks are not affected by weapon freshness, lots of style can be extracted from large swarms of Filth. The shockwave is not as effective for dispatching radiant Filth due to its low damage and their more robust resistance, but it can still afford the player some breathing room by cancelling their attacks and launching them into the air for more damaging follow-ups, and the initial melee punch is still capable of killing individual radiant Filth instantly.

Difficulty Changes

Harmless

Attacks have a cooldown of 0.4 seconds.
Filth move at a max speed of 10 u/s, accelerate at 15 u/s², and turn at 400 °/s.
Animations are 50% slower.
While readying a lunge during a Bite, Filth can only turn at 360 °/s.

Lenient

Attacks have a cooldown of 0.3 seconds.
Filth move at a max speed of 15 u/s, and turn at 400 °/s.
Animations are 25% slower.
While readying a lunge during a Bite, Filth can only turn at 720 °/s.

Violent

Attacks have a cooldown of 0.1 seconds.
Filth accelerate at 60 u/s², and turn at 2600 °/s.
Animations are 25% faster.

Brutal

Attacks have a cooldown of 0.1 seconds.
Filth accelerate at 120 u/s², and turn at 9000 °/s.
Animations are 50% faster.
Filth will use their Jump attack.
When fighting the player, Filth will attempt to predict where it will be in 0.2 seconds upon lunging during a Bite.
Filth move forward at 50 u/s while biting.

Terminal Entry

Filth

TYPE: Lesser Husk

DATA:
Husks are physical manifestations of the souls of the damned.

The physical form is based on the value of the original soul, which is determined by the strength of its will and its prevalence in public consciousness: the living souls that remember it.

Filth are the lowest form of Husk, whose souls were too weak and unimportant to even form a complete physical body.

Even among Husks, they have the lowest intelligence, driven purely by hunger.

STRATEGY:
- Most weapons are easily capable of taking down Filth, but their powerful jaws and sheer numbers can overwhelm a target quickly if underestimated.

- Explosives are the most effective way to take down swarms, but any weapon that can hit more than one target will be efficient.

Media

FILTH
General
Class	Lesser Husk
Health	0.5
Weight	Light (Grounded)
Rank	0
Locational Damage
Head (200%)	;
Limbs (150%)	;
Conditional Modifiers
Flammable	;
Airshot	;
Splatters	50 u/s
Magnet Pull	;
Damage Type Modifiers
	Shotgun Parries: 200%; Attractor Nails/Saws: 200%; Explosions: 50%;
Radiance Multipliers
Health	5x
Damage	1.5x
Speed	1.75x
Appearances
	0-1, 0-2, 0-3, 0-4 1-1, 1-2, 1-3; 2-1, 2-2, 2-3; 3-1 4-1, 4-2, 4-3, 4-4, 4-S; 5-1, 5-2, 5-3; 6-1 7-3, 7-4, 7-S 0-E The Cyber Grind
Cyber Grind Data

Icon

Gameplay Demonstrations

A Filth performing its bite.

Concept Art & Renders

Mural seen in 4-2.
Concept art by Jericho.
Original model.

Audio

Spawn
Footstep 1
Footstep 2
Footstep 3
Footstep 4
Bite
Falling
Death

Trivia

The Filth's name and appearance are inspired by the Swans album of the same name.^[1]
Filth originally looked very different, sporting arms and a face. Their model and textures were changed to their current designs in demo version 1.05.
- Hakita has noted that after this design update, tester complaints about the Filth's AI being "too dumb" stopped.^[2]
- The original model was reused for Something Wicked in 0-S and for the Puppets found in the first segment of 7-3.
When asked, Hakita has stated that Filth are able to "see" V1 is because its vibes are off. The same answer was given for Cerberi and Sisyphean Insurrectionists.^[3]
The Filth's screaming while falling was originally meant as a placeholder, but was kept in because Hakita stated that it was very funny.
When viewing the texture map of the Filth, its jaws appear to be closed and were adjusted by Victoria Holland to the accord of Hakita wanting them to be as big as possible. Every time he would be dissatisfied with their size, he would tell her "BIGGER!" until they met the size that he desired.
Inside the top of the clock tower in 7-2 is a single Filth sleeping on a bench that cannot be killed by the player's weapons or be interacted with. But when the clock tower is bombed and collapses on its side, the Filth sleeping in it is presumably killed.