← All monsters

Tyrannosaurus

Animal · major threat

Tyrannosaurus bestiary portrait
Tyrannosaurus top-down encounter tokenTyrannosaurus top-down flat-top hex token

Animal · 12 hexes · SM +5 Tyrannosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts; answers Tyrannosaurus Rex (SRD 5.1); Tyrannosaurus (SRD 3.5)]

Twelve metres of animal whose only real predator is another one of itself. It smells a party long before it sees them, it does not stalk, and it does not test — it walks straight in, because in its entire experience nothing has ever been worth caution. The correct response is distance and terrain, not a plan.

Attributes

ST50
DX11
IQ3
HT14
HP50
Will10
Per11
FP14
Basic Speed6.25
Basic Move6
Dodge9
DR4

Melee attacks

UsageLevelDamageReach
BiteBite (13): 5d+1 impaling, Reach C,2. Takes a whole person, or a whole horse, and does not need a second attempt. Jaws that crack bone as a matter of routine.135d+1 impalingC,2
TrampleTrample (11): 5d+2 crushing, Reach C. Against a target already down.115d+2 crushingC

Traits (13)

  • Bestial
  • Bloodlust (12)
  • Cannot Speak
  • Damage Resistance 4 (Tough Skin)
  • Discriminatory Smell
  • Enhanced Move 0.5 (Ground)
  • Fangs (Bone-Cracking Teeth)
  • Fearlessness 3
  • High Pain Threshold
  • Horizontal
  • Night Vision 3
  • No Fine Manipulators
  • Restricted Diet (Carnivore)

Skills (2)

  • 13Brawling
  • 12Tracking

Notes

  • GCS ancestry draft: gcs/tyrannosaurus.gct
  • Independent build total: 40 points of racial traits plus 8 points of racial skills.
  • Answers the SRD heading(s): Tyrannosaurus Rex (SRD 5.1); Tyrannosaurus (SRD 3.5). 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: 7000 kg. ST, Size Modifier and DR are checked against it; see the gurps-animal-sanity-check skill for the bands.
  • Movement: ground Move 6, 9 at a sprint (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.
  • Twelve metres nose to tail, which is the SM +5 row.
  • ST from Basic Lift: it lifts and shakes a carcass the weight of a horse, which is the heaviest thing it demonstrably does. Tonnage would give a larger figure that no encounter could use.
  • At this Size Modifier the published Strength discount for size has bottomed out, so the racial template prices ST at the floor of its cost rather than lower.
  • The bite is impaling rather than cutting. A tyrannosaur's teeth are thick conical pegs built to punch through bone and hold, not serrated blades — which is what separates it from the dromaeosaurs in this batch, whose teeth genuinely are knives.
  • Added after a post-hoc comparison against independent GURPS fan conversions of this creature: Night Vision; the Tracking skill, which a creature with Discriminatory Smell should always have. The comparison surfaced the gap; the build is still ours.

Encounter rating

CER96
Offense44
Protection52
Threat tiermajor
Appearing1
Wandering1

Tags

  • monsters-on-automatic
  • ai-generated
  • doa-authored
  • srd-5-1
  • srd-3-5
  • animal
  • reptile
  • dinosaur
  • predator
  • prehistoric
  • apex
  • wandering-encounter

GCS v5 downloads

Where this one came from
Source record
Tyrannosaurus [Monsters on Automatic, SRD coverage: dinosaurs and prehistoric beasts]
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): Tyrannosaurus Rex (SRD 5.1); Tyrannosaurus (SRD 3.5).
  • Racial template: 40 points across 19 traits, plus 2 racial skill(s) worth 8 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.