Tarrasque - Dungeons on Automatic Bestiary

Magical Beast · SM +7 Tarrasque [Monster Manual, page 240]

Attributes

ST160

DX12

IQ6

HT18

HP160

Will16

Per16

FP48

Basic Speed5.5

Basic Move4

Dodge9

DR30

Melee attacks

Usage	Level	Damage	Reach
Blunt ClawsBlunt Claws (18): thrust 26d+1 crushing (KYOS: 15d crushing), Reach C-10.	18	thrust 26d+1 crushing (KYOS: 15d crushing)	C-10
FangsFangs (18): thrust 26d+1 impaling (KYOS: 15d impaling), Reach C.	18	thrust 26d+1 impaling (KYOS: 15d impaling)	C
HornsHorns (18): thrust 26d+2 impaling (KYOS: 15d+1 impaling), Reach C-10. The tarrasque may gore with both horns as a single attack; if it hits, figure damage for each horn separately. They have the same DR as the skull (DR 32). If the tarrasque loses one horn, it may still attack with the other.	18	thrust 26d+2 impaling (KYOS: 15d+1 impaling)	C-10
Tail SlapTail Slap (18): thrust 31d+2 impaling (KYOS: 18d+1 impaling), Reach C-10. Only back hexes.	18	thrust 31d+2 impaling (KYOS: 18d+1 impaling)	C-10
Fling SpikesFling Spikes (18): 4d impaling, RoF 6, Range 50/100. Recharge 15 seconds.	18	4d impaling, RoF 6, Range 50/100. Recharge 15 seconds	—
Frightful PresenceWhen a creature is within 160 yards of the tarrasque, it must roll a Fright Check at a -6 penalty. If a victim succeeds at his Fright Check, he will be unaffected by this ability for one hour. Note that the mere presence of the tarrasque is enough, even if the victims can neither see the tarrasque nor hear it.	—	—	160 yards

Traits (24)

Bestial
Cannot Speak
Combat Reflexes
Discriminatory Smell
Extra Attack 1
Hidebound
High Pain Threshold
Immunity to Energy Drain (Attribute penalizing Afflictions and FP damage)
Immunity to Metabolic Hazards
Immunity to Noxious Fire Effects
Injury Tolerance (Damage Reduction, 1/2)
Magic Resistance 10 (Improved)
Metabolism Control 10 (Hibernation)
Nictitating Membrane 10
Reduced Consumption 3
Regeneration (Extreme; Heals Radiation)
Regrowth
Restricted Diet (Carnivore)
Semi-Upright
Social Stigma (Monster)
Super Jump 2 (Costs Fatigue, 1 FP)
Temperature Tolerance 10
Unaging
Unkillable 2

Skills (4)

18Brawling
18Innate Attack (Projectile)
18Jumping
18Wrestling

Notes

GCS ancestry draft: gcs/tarrasque.gct
Source template total: 1953 points.
Library-rebuilt template total: 1954 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Review attacks, special abilities, encounter frequency, treasure, grappling, and GCS modifiers before approval.
Exact GCS library matches change the template by +1 point(s).

Encounter rating

CER523

Offense324

Protection199

Threat tiersevere

Appearing1

Wandering1

GCS v5 downloads

Where this one came from

Source record: Tarrasque [Monster Manual, page 240]
Source system: gurps_4e_fan_conversion / author_permission
Released under: cc_by_4_0
Conversion: 0.2.0-reviewed
Review status: approved
Credit: Original GURPS conversion by Enraged Eggplant, from Monsters (May 11, 2024); adapted and republished with permission.

GCS ancestry draft: gcs/tarrasque.gct
Source template total: 1953 points.
Library-rebuilt template total: 1954 points.
CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
Issue #5: 1 special ability construction(s) restored (Frightful Presence). 1 save-or-disable construction(s) are scored through the affliction term at the source's stated point cost, or at Binding ST where the source builds the ability as a Binding.
GCS cost adjudication for "Super Jump 2 (Costs Fatigue, 1 FP, -5%)": the source states 18 points and the native GCS library computes 19. Adopted the native library value of 19. Super Jump is 10 per level (B89): 20 at -5% is 19. The stated 18 rounds the wrong way.
CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 324, PR 199, CER 523, threat tier severe.
Conversion baseline reported OR 266, PR 199, CER 465 (tier severe). The reviewed values come from the consumer CER implementation, which rounds damage once after the damage-type multiplier and credits ranged accuracy; the conversion baseline ceilinged the damage base first and ignored range.
Encounter metadata derived (solitary): average number appearing 1, wandering weight 1. Encounter metadata derived for 0.2.0 from the reviewed threat tier and creature class (appearing: minor 4 / standard 2 / major 1 / severe 1, forced to 1 for solitary classes — including swarms, which are a single multi-body creature — and raised to 6 for gregarious minor creatures; wandering weight: minor 4 / standard 3 / major 2 / severe 1). The fan-conversion source states no appearing-in-numbers or wandering values, so these are derived, not source mechanics.
Lair, treasure, and grappling remain unpopulated in 0.2.0 by package policy: the authorized fan-conversion source states no lair, treasure, or grappling values, and review declines to invent them. See review/policy/0.2.0-empty-field-policy.md.
Review approved by automated-mechanical-review on 2026-07-26 (batch ee-2026-07-26-b1-gcs-costs); GCS fidelity check passed, DOA playability check passed.
Every exact-identity cost discrepancy on this record is adjudicated against the published GURPS cost table in review/reports/gcs-adjudication.md; the adopted value and its basis are recorded in conversionNotes.
Visual GCS verification of the .gct is not claimed by this decision; checks.gcsVisualPass is false.

Enraged Eggplant GURPS monster conversions; used, adapted, and republished with unrestricted permission from the author. Portrait and tokens are AI-generated original art. Sources and credits.