Monstrous Humanoid · SM -2 Derro [Monster Manual, page 49]
Attributes
ST5
DX11
IQ10
HT11
HP5
Will10
Per10
FP11
Basic Speed5.5
Basic Move4
Dodge9
DR2
Melee attacks
| Usage | Level | Damage | Reach |
|---|---|---|---|
| SM-2 SmallswordSM-2 Smallsword (12): thrust 1d-3 impaling (KYOS: 1d-6 impaling). Reach 1. | 12 | thrust 1d-3 impaling (KYOS: 1d-6 impaling) | 1 |
| SM-2 Crossbow (ST 5)SM-2 Crossbow (ST 5) (13): thrust 1d-2 impaling (KYOS: 1d-5 impaling), Acc 4, Range 100/125, RoF 1, Shots 1(4). A derro usually carries 1d doses of Medium-size Spider Venom. | 13 | thrust 1d-2 impaling (KYOS: 1d-5 impaling), Acc 4, Range 100/125, RoF 1, Shots 1(4). A derro usually carries 1d doses of Medium-size Spider Venom | — |
Traits (7)
- Callous
- Combat Reflexes
- Infravision
- Magic Resistance 1 (Improved)
- Sadism (12)
- Silence 1
- Weakness (1d per 30 minutes; Sunlight)
Skills (7)
- 13Crossbow
- 12Innate Attack (Gaze)
- 12Interrogation
- 12Intimidation
- 12Poisons/TL3
- 12Smallsword
- 14Stealth
Notes
- GCS ancestry draft: gcs/derro.gct
- Source template total: 6 points.
- Library-rebuilt template total: 6 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.
Encounter rating
CER6
Offense5
Protection1
Threat tierminor
Appearing6
Wandering4
Tags
- srd-3-5
- monstrous-humanoid
GCS v5 downloads
Where this one came from
- Source record
- Derro [Monster Manual, page 49]
- 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/derro.gct
- Source template total: 6 points.
- Library-rebuilt template total: 6 points.
- CER was computed from parsed Typical Stats using the Dungeons On Automatic baseline CER path.
- CER recomputed from the reviewed Typical Stats through the canonical Dungeons on Automatic CER path: OR 5, PR 1, CER 6, threat tier minor.
- Conversion baseline reported OR 6, PR 1, CER 7 (tier minor). 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 (gregarious): average number appearing 6, wandering weight 4. 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-b4-special-mechanics); GCS fidelity check passed, DOA playability check passed.
- Special-mechanics record. Mechanics the CER path cannot price are named per record in review/reports/cer-audit.md rather than folded into the number, and encounter counts are capped where a save-or-disable attack is present.
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.