| Minor (2 BPs) | Medium (4 BPs) | Major (6 BPs) | Mutant Flaw | Description | Advancement |
|---|---|---|---|---|---|
| 1-6 | - | - | Aberrant Deformity | Cannot use normal armour, -10 to disguise-related Bluff checks. | Cannot be disguised as human at all. |
| 7-12 | - | - | Albinism | Exposure to daylight causes -2 to Constitution and Strength. | Increase penalty by -2. |
| 13-16 | - | - | Attention Deficit | -4 penalty to Craft, Disable Device, Perform, and Repair checks. | Increase penalties by -2. |
| 17-22 | - | - | Bizarre Appearance | -1 to Charisma, - 6 to disguise-related Bluff checks. | Additional -1 to Charisma, -10 to Disguise checks. |
| 23-26 | - | - | Distinctive Odour | Smells horrible. -2 on some Cha-related interaction skill checks. | None. |
| 27-30 | - | - | Dyslexia | Never literate, cannot perform any skills that require reading. | None. |
| 31-33 | - | - | Glowing | Glow that sheds light 5 feet. Visible from afar in darknes. -6 to disguise-related Bluff checks. | None. |
| 34-38 | - | - | Hemihypertrophy | Speed reduced by 5 feet; -2 on Acrobatics checks. | Decrease speed by 5 feet, increase skill penalties by -2. |
| 39-42 | - | - | Hermav | Hermaphrodite. -2 to Diplomacy and disguise-related Bluff checks. | Increase skill penalties by -2. |
| 43-47 | - | - | Hunchback | -1 to Charisma, speed reduced by 5 feet. | Additional -1 to Charisma, decrease speed by 5 feet. |
| 48-51 | - | - | Malformed Mouth | -2 on most Cha-related interaction skill checks. | Character cannot speak. |
| 52-57 | - | - | Medical Incompatibility | Must make Medical Incompatibility checks (Fortitude save DC 15). | Increase DC by 5. |
| 58-62 | - | - | Phobia | Becomes shaken when exposed to object of phobia. | Becomes panicked/paralyzed instead. |
| 63-64 | - | - | Sensitivity to Acid | Double damage from acid. | Increase damage multiplier (×3, ×4). |
| 65-66 | - | - | Sensitivity to Cold | Double damage from cold. | Increase damage multiplier (×3, ×4). |
| 67-68 | - | - | Sensitivity to Electricity | Double damage from electricity. | Increase damage multiplier (×3, ×4). |
| 69-70 | - | - | Sensitivity to Fire | Double damage from fire. | Increase damage multiplier (×3, ×4). |
| 71-74 | - | - | Sensitivity to Poison | Double damage from poison. | Increase damage multiplier (×3, ×4). |
| 75-76 | - | - | Sensitivity to Sonics | Double damage from sonics. | Increase damage multiplier (×3, ×4). |
| 77-80 | - | - | Thin-Skinned | -2 penalty to Defense. | Increase penalty by -2. |
| 81-84 | 1-2 | - | Anaphylaxis | Poisoned (Fortitude save DC 15, initial/secondary damage 1d6 Dex/1d6 Dex) by contact with offending material. | Increase save DC by 2 and increase damage die (1d8, 1d10). |
| 85-88 | 3-4 | - | Heightened Metabolism | Double food and water requirements, -4 on saves vs. poison. | Increase food and water requirements (×3, ×4), increase save penalty by -2. |
| 89-91 | 5-6 | - | Light Sensitivity | -2 on all skill checks and attack rolls in bright light. | Increase penalty by -2. |
| 92-94 | 7-8 | - | Poor Hearing | -6 to hearing-related Awareness checks, -1 to initiative. | Deaf. Cannot make Listen checks, -4 to initiative. |
| 95-97 | 9-11 | - | Poor Mobility | Cannot move more than ×2 base speed. | Cannot move more than base speed. |
| 98-100 | 12-14 | - | Reduced Charisma | -4 to Charisma. | Increase penalty by -2. |
| - | 15-17 | - | Adrenaline Deficiency | -4 on Con checks, -2 to initiative. | Increase penalties by -4 and -2, respectively. |
| - | 18-20 | - | Brachydactyly | -2 to melee attacks and Craft, Disable Device, Repair, Sleight of Hand, and Treat Injury checks. | Increase skill penalties by -2. |
| - | 21-23 | - | Critical Vulnerability | Critical range of all attacks suffered increases by 1. | Increaces critical threat range by 1. |
| - | 24-26 | - | Light Blindness | Blinded by exposure to bright light for 1d4 rounds. | Increase blindness duration (1d6, 1d8 rounds). |
| - | 27-29 | - | Nervous Spasms | -2 to ranged attacks and Craft, Disable Device, Repair, Sleight of Hand, and Treat Injury checks. | Increase skill penalties by -2. |
| - | 30-32 | - | Night Blindness | Blindness in any poorly-lit environment. | Blindness except in brightly-lit environments. |
| - | 33-35 | - | Pint-Sized | Treat as one size class smaller for opposed checks and weapon use. | None. |
| - | 36-40 | - | Rad-Sensitive | Treat all radiation exposure as one level higher. | Increase exposure by additional level. |
| - | 41-44 | - | Reduced Intelligence | -4 to Intelligence. | Increase penalty by -2. |
| - | 45-48 | - | Reduced Wisdom | -4 to Wisdom. | Increase penalty by -2. |
| - | 49-51 | - | Skeletal Deterioration | Double damage from bludgeoning attacks. | Increased damage multiplier (×3, ×4). |
| - | 52-54 | - | Slow Movement | One "step" slower. | Additional "step" slower. |
| - | 55-58 | - | Susceptible to Disease | -8 on all Fort saves vs. disease. | Increase penalty by -4. |
| - | 59-62 | - | Susceptible to Poison | -8 on all Fort saves vs. poison. | Increase penalty by -4. |
| - | 63-65 | - | Susceptible to Psionics | -8 on all Will saves vs. mind-influencing psionic effects. | Increase penalty by -4. |
| - | 66-70 | - | Susceptible to Radiation | -8 on all Fort saves vs. radiation. | Increase penalty by -4. |
| - | 71-73 | - | Syncope | Lose consciousness when surprised (Fortitude save DC 15). | Increase save DC by 5. |
| - | 74-76 | - | Terrible Fortitude | -6 on all Fortitude saving throws. | Increase penalty by -2. |
| - | 77-79 | - | Terrible Reflexes | -6 on all Reflex saving throws. | Increase penalty by -2. |
| - | 80-82 | - | Terrible Willpower | -6 on all Will saving throws. | Increase penalty by -2. |
| - | 83-84 | 1-4 | Atrophied Cerebellum | -2 to Intelligence, Wisdom, and Charisma. | Increase penalties by -1. |
| - | 85-86 | 5-8 | Dwarfism | One size category smaller, -2 penalty to Strength. | None. |
| - | 87-90 | 9-10 | Low Damage Threshold | Massive Damage threshold reduced by half. | Reduce by half again. |
| - | 91-92 | 11-14 | Pack Mentality | Must make Will save to ignore orders from others (DC varies). | Increase save DC by 5. |
| - | 93-94 | 15-17 | Poor Respiratory System | Fatigued after 5 rounds of combat. | Decrease time (3 rounds, 1 round). |
| - | 95-96 | 18-21 | Poor Vision | Ranged targets treated as concealed, -4 to vision-related Awareness checks. | All targets are treated as concealed, increase skill penalty to -8. |
| - | 97-98 | 22-25 | Stiff Motion | Always flat-footed. | None. |
| - | 99-100 | 26-28 | Terminal Limb Deficiency | Limb suffers -4 penalty to Strength and Dexterity. Some skill penalties. | Additional impaired limb. |
| - | - | 29-33 | Bleeder | Wounds bleed for 1d6 rounds, natural healing reduced by half. | Increase bleeding duration (1d8, 1d10 rounds). |
| - | - | 34-37 | Blindness | Character is blind. | None. |
| - | - | 38-43 | Crude Hands | -4 with all handheld items (weapons, etc.) and Craft, Disable Device, Repair, Sleight of Hand, and Treat Injury checks. | Increase penalties by -2. |
| - | - | 44-49 | Fear Response | Shaken in combat (or other danger). | None. |
| - | - | 50-55 | Fragile | Double damage from weapons (not energy, psionics, etc.). | Increase damage multiplier (×3, ×4). |
| - | - | 56-61 | Hesitation | Partial actions only during combat. | None. |
| - | - | 62-67 | Irradiated Body | Character's body equivalent to low-level radiation source. | Increase radiation to moderate/high source. |
| - | - | 68-73 | Missing Limb | Pick one limb; either cannot wield two-handed weapons (arm) or cannot move unaided (leg). Some skill penalties. | Good afternoon, Mr. Stumpy. |
| - | - | 74-80 | Reduced Constitution | -4 to Constitution. | Increase penalty by -2. |
| - | - | 81-87 | Reduced Dexterity | -4 to Dexterity. | Increase penalty by -2. |
| - | - | 88-94 | Reduced Strength | -4 to Strength. | Increase penalty by -2. |
| - | - | 95-100 | Tumourization | -2 to Dexterity, -4 to Charisma, suffer Aberrant Deformity and Slow Movement flaws. | Additional -1 to Dexterity, -2 to Charisma, advance Aberrant Deformity and Slow Movement flaws. |