The Forest Wiki
Also known as
Octopus Mutant
Subject 82C6
Creepy Mutant
Added in
v0.01 (normal)
v0.19 (blue)
Weapon(s) used
Thunder clap
Single strike
Triple strike
Aggressive when alerted
Spawns on Day
Day 7 (normal)
Day 14 (blue)
Normal: 23 / Hard/HS: 45
Blue - Normal: 30 / Hard/HS: 60
Normal: 200 / Hard/HS: 300
Blue - Normal: 250 / Hard/HS: 375
Difficulty Mode Statistics
Damage Diff
50% more on hard modes
Building Damage
100% more on hard modes
Health Diff
50% more on hard modes
Spawn Chance
50% more likely on hard modes
Attack Chance
150% more likely to on hard modes
Follow Up Attack Chance
150% more likely on hard modes
Fire Damage Resistance
65% LESS damage on hard modes
Heavy Attack Knock Down Chance
Cannot be knocked down at all

The Armsy is a type of creepy mutant, given their name because of their many arms. There are two variations: the common pale skin-colored version and the rarer blue version.


Armsies can be found from the beginning in the game, but only if the player moves deeper into the caves where they spawn in scripted areas.

After day 7, they will begin spawning above ground (day 14 for the stronger blue variant). Up to three can attack at any given time, though one or two is much more common. If unprepared, Armsies can cause severe damage to the player’s base.

An Armsy is taller than the player and normal mutants, along with being significantly stronger than them. They will bellow angrily intermittently, so the player can usually hear an Armsy before it is seen. As with all creepy mutants, it is best to kill it from a distance with fire and explosives, so that it does not get a chance to hit.

Just like the Virginia, it appears to be made out of 3 bodies. It has 6 arms, deformed legs, backward feet and a tentacle-like limb, possibly the umbilical cord. It does not have a head or any recognizable facial features, but it does have a slit down its frontal end that opens when detecting the player, and can be assumed that it sees from this area.

It will swing its arms when trying to attack the player. In the trailers, it is seen breaking defensive walls on the surface. It takes 2-3 hits to kill an unarmored player.

When wandering the surface, they tend to randomly knock down trees.

They are sometimes non-aggressive, and will wander seemingly randomly. However, if in this mode, they will attack if provoked, as well as destroy any obstacles in its path. If one is found wandering like this, it is best to leave it alone and leave the area stealthily.

Armsy will attack the player's buildings unprovoked, provided it has stumbled near them. It does not need to sense the player to start this behavior.


Armsy is suggested to have been created by Sahara after a small boy had been put in the Resurrection Obelisk, resulting in the child becoming malformed and developed multiple appendages, facial distortions, and high aggression.

As seen in the Orientation Slideshow, he is called "Subject 82C6", with "Armsy" being six years old at the time of his mutations, with his name likely being a nickname issued by the staff.

According to the slideshow, he developed multiple limbs, which is stated to be a "sibling anomaly", suggesting that Armsy might actually be more than one child fused together.

At some point during the laboratory's active research phase, an Armsy broke free of containment and began attacking and killing the scientists nearby. As Megan Cross was present at the time, it is likely that this incident is what lead to Megan's death.

Cave Combat

Luckily, with several Armsy cave spawns, the player can approach the Armsy from above. In this case, the player should shoot flame arrows or throw Molotovs from their vantage point, taking care not to fall, which will both damage the player and put him in reach of the Armsy.

In cases where the Armsy must be approached on flat ground, or if the player falls to the Armsy's level, it is best to kite it rather than attempt melee combat. Fire weapons are still effective, though the Armsy will often stumble towards the player thrashing even when on fire. Additionally, it is almost never alone so the player should take note of nearby babies or mutants as to not walk straight into them while attempting to avoid it.

If you can catch the Armsy by itself, or kill off its escorts, an effective way of killing it is to poison it with one or two poison arrows and then attack it with a chainsaw. The slow from the poison and the flinch from the chainsaw will lock up the Armsy, making it an easy kill. Note this will leave you bloody.

Surface Combat

Armsies tend to attack, either alone, with other creepy mutants or leading a group of 3 to 5 cannibals (Mostly 3). Sometimes, they will not locate/sense you, and will just stand or wander outside or around your base as mentioned above. If it attacks your base, it will destroy buildings very quickly if building destruction mode is switched on. However, if you have multiple layers of walls, it typically does not penetrate past one wall, but it will intermittently attack and eventually level anything that interferes or gets in the way of the AI tracking to your character.

You can block its attack. if using weapons with 10 block like the rusty axe, club or turtle shell, it will do no damage at all.

It can be a good idea to run from your base or save and exit if an Armsy appears at your base. It may seem counter-intuitive, but it is best to draw it away, as it will topple all of your hard work until it can reach you; it is an unpredictable enemy. Armsy is able to knock down trees, and thus attempting to elude it in a tree house will result in it attacking the base of the tree you're in until it collapses.

The chainsaw method should also work on the surface; however, it will be much more difficult to isolate the Armsy on the surface.

Blue Armsy


Later into the game, a blue-skinned Armsy may be encountered. They have more health, and are 33% stronger than a regular Armsy. The player is advised to take extra caution against a Blue Armsy, due to its higher stats. Although called "Blue Armsy", they appear more gray, similar to the pale mutants in direct sunlight.

In Cave 6, a blue Armsy can be found guarding the Keycard and Camcorder along with a half dozen mutant babies. Deep within Cave 7, two blue Armsies will be encountered together, guarding a gate. The player must take extra caution when trying to take on both mutants at once.

The Blue Armsy can be found on the surface traveling with pale mutants and other creepy mutant(s) beginning around Day 14. Though they are quite rare for a while, they will eventually become more common. As the days progress further, up to four Blue Armsys can be spotted travelling along with other creepy mutants, though most of the time there are only one or two.

A patrol type containing more than one blue Armsy would be 2 to 4 blue Armsies walking with a single Cowman.


  • It is possible to encounter up to six Armsies at any given time, though this is extremely rare. In most cases, the player will never run into more than two or three individuals.


Update history

Version Changes
v1.0 Head trophies can now be harvested from creepy corpses
v0.67 Fixed creepy mutant ragdolls able to trigger traps, causing them to trigger indefinitely

Creepy mutants will now stagger backwards when hit by traps

Creepy mutants can now damage traps with their attacks

v0.66 Reduced chainsaw damage against creepy mutants and end game boss
v0.64 Audio – Added gore impact sfx for when exploding Armsy enemy type.
v0.62 Fixed player stats being affected by armsy knocking down trees
v0.54 (Balance) Added some skinny pale enemies to cave 1 armsy room
v0.53 Creepy mutants can now travel in groups

(Balance) Overall more creepy mutants will spawn in hard mode

v0.50 Creepy mutants now try to avoid following players down narrow passages inside caves

Fixed performance issue if players wore red paint around large distorted mutants

v0.48 Fixed creepy mutants sometimes running away from player when in shallow water inside caves
v0.40 (audio) Fixed missing creepy mutant burning sfx for clients

New art added: bloody gibs (added to armsy blown apart model)

v0.39 (Multiplayer) Fixed creepy mutant ragdolls disappearing for client

Creepy mutants can now break down wooden planks

Fixed Armsy getting stuck on wooden planks inside cave 7

v0.38 Fixed creepy mutants not breaking apart stalagmites inside caves

Armsy is faster and more aggressive now when attacking player

New death and melee reaction animations added to armsy

v0.37 Audio – Armsy now makes sound when detecting player presence nearby.
v0.35 Creepy mutants will attack walls and structures that are blocking the path to the player more often

(Multiplayer) Fixed clients being unable to deal melee damage to armsy

v0.34 Fixed blue creepy mutants skin not syncing on death
v0.33 Creepy mutants in the overworld can now travel in groups with other mutants!!

Tougher, pale creepy mutants can now be encountered in the overworld

Slightly increased health of all creepy mutants

v0.31 (Balance) Slightly reduced health on all creepy mutants

Burnt Armsy texture seams painted out

v0.30 Linked creepy mutants to new dynamic damage skin shader to give clearer idea how much damage they have taken

(Audio) Added burn SFX to armsy and cowman

v0.28 (Audio) Last Armsy audio

Removed Armsy from bottom of cave 5

(Audio) added on fire, hurt and death sounds for Armsy

v0.27 (A.I.) fixed Armsy occasionally spinning on the spot for no reason

(Audio) added Armsy running breaths and tuned the trees falling sound a little more

(Audio) Added Armsy Tree Knockdown sound

(Audio) Added new Armsy yells

v0.26 (multiplayer) Fixed issue with incorrect material on creepy mutant ragdolls

New burn animations added to creepy mutants

(audio) Improved armsy arm sounds

(audio) Added some distant Armsy sounds

Fixed armsy being able to fall into water at the bottom of cave 5

v0.23 Improved fire particles on creepy mutants

Decreased bomb damage to distorted mutants

v0.19 Pale versions of armsy/vag added to world. Faster, stronger, with more armour

Tiered destruction system! Enemies can now only damage certain structures, depending on how strong they are. Only armsy can bring down defensive walls.

Armsy will attack structures more often and deals more damage

Improved animation for Armsy behaviours

(multiplayer) Fixed some cases of creepy mutants not targeting remote players correctly

v0.18b Increased time until distorted mutants come out, and at first will only come out at night
v0.18 Improved distorted mutants pacing and navigation in world
v0.13 Armsy combat improvements – can now turn around quickly, attack to left and right and attack from further away. Will swipe at trees more often. Will react to explosions by staggering backwards.

Armsy will knock down walls and other structures near player, and will now interact better with dynamic logs/props pushing them away

Lowered damage amount molotovs do to Armsy. Setting Armsy on fire will cause him to become enraged, running around or attacking the player

v0.12 Tree attack animations added to armsy

Mid and close trees can now be torn up by armsy

v0.11 Armsy will now sometimes tear down trees
v0.10 Fixed enemy skin and player arms sometimes losing ability to receive shadow and appearing overbright
v0.07 Cave’s now only contain blue skinned enemies and distorted mutants
v0.06 Creepy mutants and animals no longer get stuck in noose trap spinning forever
v0.05 Distorted mutants can now be killed with flare gun/fire
v0.04 Distorted mutants can now be killed with regular weapons

Distorted mutants are more aggressive and deadly in combat and have expanded actions

v0.01 Armsy was added. He was in the cave and could not move. The player could not kill it.
Mutants: Regular MutantsSkinny MutantsPale MutantsPale Skinny MutantsMasked MutantsMasked Skinny MutantsPainted MutantsFire MutantsDynamite Mutants
Creepy Mutants: ArmsyVirginiaCowmanMutant BabyBlue ArmsyBlue VirginiaWormGirlEnd Boss