← All monsters

Giant Centipede

Animal · minor threat

Giant Centipede bestiary portrait
Giant Centipede top-down encounter tokenGiant Centipede top-down flat-top hex token

Animal · 1 hex · SM -2 Giant Centipede [Monsters on Automatic, SRD coverage: vermin and monstrous arthropods; answers Giant Centipede (SRD 5.1)]

A metre of segmented armour on forty legs, moving along a wall faster than a person walks. It hunts in the dark by touch and vibration, kills with a pair of hooked poison claws under the head, and is almost impossible to corner because it goes wherever the wall goes.

Attributes

ST4
DX13
IQ1
HT10
HP4
Will8
Per9
FP10
Basic Speed5.75
Basic Move5
Dodge8
DR1

Melee attacks

UsageLevelDamageReach
BiteBite (14): 1d-6 impaling, Reach C. The puncture is trivial. What follows is not: roll HT or take a fever, cramps and a swollen limb that is useless for hours.141d-6 impalingC

Traits (15)

  • Bestial
  • Cannot Speak
  • Clinging
  • Cold-Blooded
  • Damage Resistance 1
  • Extra Legs (Many Legs)
  • Fangs (Forcipules)
  • Horizontal
  • Injury Tolerance (No Brain)
  • Injury Tolerance (No Neck)
  • Injury Tolerance (No Vitals)
  • Night Vision 5
  • No Fine Manipulators
  • Restricted Diet (Carnivore)
  • Vibration Sense (Air)

Skills (2)

  • 14Brawling
  • 15Stealth

Notes

  • GCS ancestry draft: gcs/giant-centipede.gct
  • Independent build total: -113 points of racial traits plus 10 points of racial skills.
  • Answers the SRD heading(s): Giant Centipede (SRD 5.1). Only the creature identity is taken from the SRD; the GURPS statistics, ratings and prose are this project's own work and reproduce no SRD text.
  • Typical Stats, damage and ratings are derived from the racial template, not authored beside it, so the sheet and the stat block cannot disagree.
  • Body mass used to scale this build: 5 kg. ST, Size Modifier and DR are checked against it; see the gurps-animal-sanity-check skill for the bands.
  • Movement: ground Move 5 (primary). The published Move is the primary medium's cruising Move; sprint figures are stated here and not folded into it.
  • Treasure and grappling are not authored for this batch and ship as explicit nulls; `lair` carries a short habitat note, because where a wandering animal dens is an encounter fact rather than a loot one.
  • About 90 cm, which is the SM -2 row.
  • IQ 1 — this is the floor, and correct. A centipede is a reflex arc with legs.
  • The venom is priced as a 15-point disabling ability so the rating can see it; the puncture alone would rate near zero.

Encounter rating

CER1
Offense1
Protection-7
Threat tierminor
Appearing3
Wandering5

Tags

  • monsters-on-automatic
  • ai-generated
  • doa-authored
  • srd-5-1
  • animal
  • arthropod
  • vermin
  • underground
  • venomous
  • wandering-encounter

GCS v5 downloads

Where this one came from
Source record
Giant Centipede [Monsters on Automatic, SRD coverage: vermin and monstrous arthropods]
Source system
doa_fixture / doa_authored
Released under
cc_by_4_0
Conversion
0.1.0-srd-independent-build
Review status
approved
Credit
Monster statistics, ratings and description prose by Monsters on Automatic; AI-generated first draft, project-reviewed, released under CC BY 4.0.
Description
Written by Dungeons on Automatic, released under cc_by_4_0
  • Independently authored GURPS build. The SRD supplies the creature identity this record answers to and nothing else: no SRD statistics, wording or presentation is reproduced, and no third-party GURPS conversion was used as an input.
  • Answers the SRD heading(s): Giant Centipede (SRD 5.1).
  • Racial template: -113 points across 20 traits, plus 2 racial skill(s) worth 10 points.
  • Every trait is drawn from the project's controlled GURPS vocabulary in scripts/srd/trait-library.mjs, which carries the page reference and published cost for each entry.
  • sourceSystem is recorded as doa_fixture because that is the package contract's value for project-authored material; the SRD headings this record answers are in provenance.coversSourceIdentities.
  • Ratings are recomputed through the consumer CER path on every build, so a mechanics change cannot leave a stale rating behind.

Copyright 2026 Monsters on Automatic. GURPS-compatible monster statistics, ratings and prose authored for this package as an AI-generated first draft under project review. No SRD text, and no third-party GURPS conversion, is reproduced. Portrait and tokens are AI-generated original art. Sources and credits.