Fractal Guardian

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Data is potentially outdated
Last updated for version
Last mentioned in changelog
The current game version is

Fractal Guardian

ID: Fractalguardian


Sight: 2
Hearing: 1

Arms, Tail, Stinger (see Defense values below)


Sensor, Torso

Immunities Vulnerabilities
Walk speed


Swim speed

2 slow - 5 fast


Always (Humans)
Never (Submarines)

Can Enter Submarine?


only 1 of the items marked with an asterisk * may drop at a time
Items Chance
Alien Circuitry 100% (1/1)
Alien Curio *
12.5% (1/8)
Alien Ornament *
12.5% (1/8)
Alien Trinket *
12.5% (1/8)

The Fractal Guardian is a Europan creature. Its origin is unknown to even the most seasoned of sailors.


The Fractal Guardian is a mechanical entity which roams the hallways of Alien Ruins. It is capable of opening ruin doors, and navigates the ruins with ease. It possesses two weapons: a blade-like spear which can be shot at intruders, Human or otherwise; and a "hook cannon" (comparable to the Harpoon Gun). It is incredibly aggressive towards anything aside from Husks, Swarm Feeders and other Ruin Guardians. It is much larger than a person and is completely capable of besting one in combat if they catch them unaware.


Rather uniquely, Fractal Guardians will attack and kill crew members, but will ignore submarines. However, they only spawn in Alien Ruins, meaning one must confront them in person. Fractal Guardians will roam the corridors of an Alien Ruin looking for intruders. The strength of the intruder is irrelevant to the Fractal Guardian, and it will attack without warning. The Fractal Guardians will not attempt to enter maintenance vents found in the ruins.

While multiple Fractal Guardians can spawn in any given Alien Ruin, they typically do not spawn in close proximity.

When under 30% of its maximum health, the Fractal Guardian's head will flash red and emit a siren-like sound. This causes the Fractal Guardian to take 0.4 Internal Damage but gain 50 Vigor. It will then attempt to retreat to a Guardian Pod and enter it for a short while. While in a pod, the guardian is slowly treated with vigor.

Combat Strategies

As Fractal Guardians possess an extremely small attack delay, it is prudent to bring medical support on ruin expeditions, and vital to bring some means of defense. Weapons such as the Autoshotgun, Riot Shotgun, and SMG are effective at destroying Fractal Guardians. It is paramount to aim for the head of the Fractal Guardian as that is its key weakpoint. Without aiming for the head, the fight may last considerably longer which exposes the player to the risk of a quick death.

In the event that melee combat is preferred, the Boarding Axe is recommended. The high damage output allows a sufficiently skilled player to take down a Fractal Guardian without having a serious threat posed to themselves. Other melee weapons are not recommended in combat.

The Guardians equipped with a hook cannon will drag the player around, and possibly out of position or away from crewmates.


Attack Target type Afflictions on hitContextStructure DamageDurationCooldownKinetic ForceNotes
Hook Cannon Character
 Bleeding (30)*
 Lacerations (30)*
 Stun (0.3)*
Any 20 3s 3 10 If not stuck to anything, the rope snaps. The rope will always snap after 45 seconds. The guardian does not use this attack when below 30% health.
Stinger Any
 Lacerations (30)*
 Bleeding (30)*
 Stun (0.2)*
Any 20 0.25s 2 12



Limb Burn Damage (all) Lacerations Bite Wounds
Sensor x 0.25 x 1.25 x 1 x 0.5 
Torso x 0.25 x 1.25 x 0.5 x 0.5 
Arms x 0.1 x 0.75 x 0.5 x 0.5 
Tail x 0.1 x 0.75 x 0.5 x 0.5


  • An NPC conversation mentions that fractal guardians are, quote, "not organic - closer to a robot than an animal". This could explain how they survived the presumed extinction of the alien species behind ruins.
  • The Fractal Guardian used to be immune to EMP attacks. This was changed in

See Also


Pets Cthulhu    •   Defense Bot    •   Huskified Storage Container    •   Orange Boy    •   Peanut    •   Petraptor    •   Psilotoad
Small Crawler    •   Crawler Hatchling    •   Fractal Guardian (Steam Cannon Fractal Guardian   •   EMP Fractal Guardian)    •   Hammerhead Spawn    •   Human    •   Husk    •   Husked Crawler    •   Husked Human    •   Leucocyte    •   Mantis    •   Moloch Baby    •   Mudraptor (Mudraptor Unarmored)    •   Mudraptor Hatchling    •   Mudraptor Veteran    •   Swarm Feeder    •   Terminal Cells   •   Tiger Thresher    •   Tiger Thresher Hatchling
Large Black Moloch    •   Bone Thresher Crawler Broodmother   •   Giant Spineling    •   Golden Hammerhead    •   Hammerhead (Moping Jack)    •   Hammerhead Matriarch    •   Moloch    •   Spineling   •   Watcher
Abyssal Charybdis    •   Endworm    •   Latcher

Ancient     •   Cyborg Worm     •   Guardian Repair Bot     •   Jove     •   Portal Guardian