GURPS 4e - Core - Update 3rd to 4th Ed.PDF - 4th edition - kamilol68

GURPS UPDATE

Compiled by DAVID MORGAN-MAR

Based on GURPS Third Edition by STEVE JACKSON

and GURPS Fourth Edition by SEAN PUNCH, DAVID PULVER, and STEVE JACKSON

Helpful Suggestions by FREDERICK BRACKIN, DEVIN GANGER, and CHAD UNDERKOFFLER

Graphic Design by JUSTIN DE WITT

I NTRODUCTION

don’t have to laboriously compare the Third

and Fourth Edition rule books yourself.

This update only deals with material from

GURPS Basic Set , Third Edition and GURPS

Compendium I . It doesn’t try to cover world-

specific rules only published in sourcebooks,

so you won’t find conversion rules for the

Coat of Slime advantage or Dexitroboping

skill. If you really need those, there are tools

and suggestions in the Fourth Edition rules

to help you.

C ONVERTING A C HARACTER

Third to Fourth Edition rules with a mini-

mum of fuss. It doesn’t go into all the new

rules – you’ll need the full GURPS Basic Set ,

Fourth Edition for that. What it does is ease

the transition for existing campaigns and

characters, so you can convert the characters

quickly and continue to use them with the

new Fourth Edition rules. You can also use

GURPS Update as a quick reference to what

has changed in character creation, so you

To convert a character from Third Edition

to Fourth Edition, you must first decide on

the purpose of the conversion. Is it to produce

a Fourth Edition character whose skills and

abilities match as closely as possible those of

the Third Edition character, or is it to gener-

ate a “quick-and-dirty” conversion so you can

get playing as soon as possible?

In either case, the point value of your char-

acter is almost certain to change. Attempting

to keep the same point total will be difficult

and will probably distort the character con-

cept to boot. The best approach is to convert

the character’s attributes and abilities, and

then simply add up the new point cost. In an

ongoing campaign, any differences between

the point costs of existing characters should

simply be ignored, as the characters have

been interacting already . . . attempting to

adjust them will interfere with their known

abilities and the flow of the campaign.

For a thorough conversion , work through

each of the following sections in sequence.

Make sure you understand the conversions of

attributes and characteristics and have them

all settled to your satisfaction before moving

on. Most advantages and disadvantages can

be converted just by reference to the table, but

be sure to read any notes and apply the advice

given. Finally, work through the skills, again

reading any relevant notes. Take into account

any changed adjustments to skill levels caused

by changes to advantages or disadvantages, as

well as any changes to skill difficulties and

controlling attributes. Half-point skills should

either be raised to a full point or dropped to

default.

For a quick-and-dirty conversion , follow

the same process, but in a looser fashion.

Boxed text in each section gives additional

advice on doing the quickest possible conver-

sion to Fourth Edition. Many of the addition-

al notes on advantages, disadvantages, and

skills can be skimmed over or ignored if a

conversion is given in the tables – though you

may be missing some of the finer details of

the rule changes governing those abilities.

These changes can be assimilated later when

you have time to read through Fourth Edition

and this Update in detail.

A TTRIBUTES

The four basic GURPS attributes are still

Strength, Dexterity, Intelligence, and Health.

Strength has changed substantially and will

need careful attention, but the other three

attributes work the same way and have only

changed in point cost.

depends on whether you are a normal exam-

ple of a race with a roughly human range of

strength, a super with unnaturally high

strength, a machine, or a massive creature

with high strength largely attributable to

body mass.

Human-Like Races

The basic damage done in combat uses

the same progression as in Third Edition. For

example, a ST 15 character in Fourth Edition

does the same basic damage (1d+1 thrust,

2d+1 swing) as a ST 15 character did in Third

Edition.

However, the weight a character with a

given ST is able to lift has changed. For exam-

ple, a Third Edition character with ST 20

could lift twice as much as a ST 10 character.

In Fourth Edition, that difference is squared,

so a ST 20 character can lift four times as

much as a ST 10 character.

Strength (ST)

Strength has changed considerably. The

appropriate way to convert your ST score

G URPS U PDATE

When the GURPS Basic Set , Third

Edition was released, we also released

GURPS Update , a conversion guide so that

those with GURPS Basic Set , Second Edition

could play Third Edition games. Now that

Fourth Edition is here, we’re doing some-

thing similar. Updating all the new rules

would require a book almost as big as the

entire GURPS Basic Set, Fourth Edition !

This edition of GURPS Update is

designed to help you convert characters from

The GM needs to decide what is more

important to preserve: combat damage, lifting

ability, or both. For most character concepts,

combat damage is the simplest choice.

Preserving both damage and lifting ability is

complex and requires bookkeeping.

Another potential factor in your choice of

converted ST score is the minimum ST

required to ready unbalanced weapons

instantly. The minimum ST and readying rules

for melee weapons have changed slightly.

Refer to Weapon Statistics (pp. B271-274) for

the rules on what ST is needed to ready your

weapons. You may find you need to increase

your ST score by a point or two to keep instant

readying ability with the following weapons:

flail, glaive, great axe, halberd, maul, poleaxe,

scythe, or warhammer. The minimum ST to

wield a weapon has not increased for any

weapon.

To preserve combat damage, simply retain

your ST score. The point cost of that ST will

change: ±10 points per ±1 ST. Then calculate

your Basic Lift and work out your new encum-

brance levels. Characters with ST 10 will be

able to carry exactly the same amount as in

Third Edition, while characters with higher ST

will be able to carry more than they could in

Third Edition.

If, on the other hand, you wish to preserve

lifting ability, convert the ST score according

to the Quadratic Strength Conversion Table,

then calculate the cost as above. This approxi-

mately preserves lifting ability, but results in

strong characters doing less damage in com-

bat than in Third Edition.

Finally, if you wish to preserve both dam-

age and lifting ability, use the following proce-

dure. If your ST is above 10, use the

Quadratic Strength Conversion Table. Then add

enough levels of Striking ST (at 5 points per

level) to match your Third Edition ST score.

This will add 5 points per level of Striking ST.

If your ST is below 10, keep your ST score

the same, and buy levels of Lifting ST (at 3

points per level) to bring your lifting ability up

to Third Edition capacity, as shown on the

Quadratic Strength Conversion Table. This pro-

cedure is fiddly and results in a complex char-

acter sheet; it is not worth the effort unless you

require an exact match of abilities.

Quick-and-Dirty Basic Attribute Conversion

Ignore this entire section. Just keep your ST, DX, IQ, and HT scores the same, ignore

the point cost changes, and move on to Secondary Characteristics .

Quadratic Strength

Conversion Table

3e ST 4e ST 3e ST 4e ST

1 3 31-34 18

2 4 35-38 19

3 5 39-42 20

4 6 43-46 21

5 7 47-50 22

6-7 8 51-55 23

8-9 9 56-60 24

10-11 10 61-65 25

12-13 11 66-70 26

14-15 12 71-75 27

16-18 13 76-81 28

19-21 14 82-87 29

22-24 15 88-93 30

25-27 16 94-99 31

28-30 17 100-105 32

Supernormal Beings and Machines

The same decision regarding preserving

damage or lifting ability applies to characters

who are superhumans, supernaturally strong

creatures such as undead mon-

sters, or machines or robots.

However, in these cases, it is

usually lifting ability that

should be preserved, because

in Fourth Edition most of the

likely targets for massive amounts

of damage will have significantly

reduced DR and HP. Convert your ST score

according to the Quadratic Strength

Conversion Table; only add Striking ST if the

amount of damage inflicted is integral to

your character concept, bearing in mind the

changes to DR and HP.

To convert ST scores above 105, see How

Quadratic ST Conversion Works .

Massive Creatures

Massive creatures are stronger than

humans primarily because of sheer body size.

Such creatures have had ST scores assigned

in various ways in Third Edition, not always

consistent. In Fourth Edition, calculate a

“normal” massive creature’s ST score based

on its mass as follows, rounding down :

ST = 2 ¥ (cube root of weight in

pounds).

Thus, a 1,000-lb. bear has ST 20 and a

16,000-lb. elephant has ST 50. These figures

may vary by up to 10% either

way to account for unusual

individuals.

The Natural (-40%)

limitation on ST no

longer exists. Creatures with “Natural” ST

should ignore the limitation and apply the

conversion rules here.

Dexterity (DX)

Your Dexterity score is unchanged. The

point cost of that Dexterity, however, has

changed: ±20 points for ±1 DX.

How Quadratic ST Conversion Works

Both Third Edition and Fourth Edition characters with an average ST of 10 can

carry the same maximum load on their backs: 300 lbs. In Third Edition this was 30 ¥

ST, but in Fourth Edition it is 3 ¥ ST ¥ ST. To keep this carrying capacity the same

across all Strengths, use the following formula and round to the nearest whole number:

Fourth Edition ST = square root of (10 ¥ Third Edition ST)

Use this formula to calculate Fourth Edition ST for Third Edition ST scores not

found on the Quadratic Strength Conversion Table .

Intelligence (IQ)

Your Intelligence score is unchanged. The

point cost of that Intelligence, however, has

changed: ±20 points for each ±1 IQ.

Health (HT)

Your Health score is unchanged. The

point cost of that Health, however, has

changed: ±10 points for each ±1 HT.

G URPS U PDATE

S ECONDARY C HARACTERISTICS

Additional attribute-like numbers that

provide game mechanical information about

a character are now called secondary charac-

teristics . Some of these, such as HP and Basic

Move, are familiar; others, such as Basic Lift

and Perception, are new.

Quick-and-Dirty Secondary Characteristic Conversion

Ignore the section on Secondary Characteristics . Use these guidelines to generate

your secondary characteristics:

Damage: Based on ST (usually will be unchanged).

Basic Lift: Calculate ST¥ST/5 lbs.

Hit Points: Either keep the same or set equal to your ST, as preferred.

Will: Equal to your IQ plus or minus levels of Strong or Weak Will, respectively.

Perception: Equal to your IQ plus any levels of the Alertness advantage.

Fatigue Points: Either keep the same or set equal to your HT, as preferred.

Basic Speed: Unchanged.

Basic Move: Round Basic Speed down to the nearest whole number.

Dodge: Equal to Basic Speed+3, rounded down.

Damage

Basic damage is still based on Strength,

and the progression is the same for all ST

scores 8 and above. If you have kept the same

ST score (and it’s higher than 7), your basic

thrust and swing damage are unchanged. If

you have changed your ST score (or it’s below

8), look up your new thrust and swing damage

in the Damage Table (p. B16).

Basic Lift

This new characteristic is equal to

ST¥ST/5 lbs. If you have extra Lifting ST, add

it to your ST before doing this calculation.

Perception

This new characteristic is by default equal

to IQ. It can be bought up or down for ±5

points per ±1 Perception. Additional levels of

Perception are equivalent to the Alertness

advantage; simply add the levels of Alertness

to Perception.

Speed can now be adjusted up or down at a

cost of ±5 points per ±0.25 Basic Speed.

Basic Move

This is the same as in Third Edition, cal-

culated by rounding Basic Speed down to the

nearest whole number. Basic Move can now

be adjusted up or down at a cost of ±5 points

per ±1 Basic Move.

Hit Points

Hit points are now based on ST, not HT. A

Fourth Edition character has HP equal to ST,

adjusted up or down at a cost of ±2 points per

±1 HP. If you wish to retain the same number

of hit points, buy more or fewer as necessary.

Fatigue Points

Fatigue points are now based on HT, not

ST. A Fourth Edition character has FP equal

to HT, adjusted up or down at a cost of ±3

points per ±1 FP. If you wish to retain the

same number of fatigue points, buy more or

fewer as necessary.

Dodge

Dodge is equal to Basic Speed+3, rounded

down to a whole number.

Wil Will equals IQ plus any Strong Will or

minus any Weak Will. Stronger and weaker

Will is now a flat ±5 points per ±1 Will, rather

than +4 for Strong Will and -8 for Weak Will.

Size Modifier

Human-sized races have Size Modifier 0

(-1 for Dwarfism, +1 for Gigantism). For

other races, refer to Size Modifier (p. B19).

Basic Speed

This is the same as in Third Edition, cal-

culated as HT plus DX, divided by 4. Basic

S OCIAL B ACKGROUND

Aspects of social background are more

fully defined in Fourth Edition than in Third

Edition. In some cases, converted characters

will gain new characteristics.

in the campaign. You must choose a native

culture.

If you are familiar with the social nuances

of another culture, this is Cultural Familiarity

in that culture. The cost is 1 point for other

cultures of your own or similar races, 2

points for an alien culture.

Spoken Language

None: Cannot speak or understand at all. 0

points .

Broken: Can speak and understand slowly

and with difficulty. 1 point .

Accented: Understand freely, but speak

with an obvious non-native accent. 2 points .

Native: Speak and understand fluently and

unaccented. 3 points .

Written Language

None: Cannot read or write. 0 points .

Broken: Can read and write haltingly, mis-

understanding many words. 1 point .

Accented: Read freely, but write with odd

or foreign word choices and expressions. 2

points .

Native: Read and write fluently. 3 points .

Record each language with the total point

cost: e.g., French (None/ Native) [3]. If your

Tech Level

Simply record your home TL. If it is dif-

ferent from the campaign TL, you should

already have Primitive or High Technology,

which translate into levels of Low TL and

High TL respectively. The definitions of TLs

have changed somewhat; see Tech Level and

Starting Wealth (p. B27) for details.

Language

Languages are no longer skills, and litera-

cy is treated separately for each language

rather than as a blanket trait.

The best way to convert language skills to

Fourth Edition is to base the conversion on

character concept rather than language skill

levels. For each language you possess, decide

which of the following levels apply for both

spoken and written forms.

Cultural Familiarity

This is a new characteristic in Fourth

Edition, which is based on character concept.

Everyone is assumed to be familiar with

one social culture, for no point cost. The GM

should determine what cultures are present

G URPS U PDATE

levels of spoken and written language are the

same, abbreviate it like this: French

(Accented) [4].

Everyone is assumed to have one native

language for no point cost. Record this as, for

example, Dwarvish (Native) [0]. If your com-

prehension of your native language is less

than this, the point cost is the cost of learning

it as an additional language, minus 6 , e.g.

Orcish (Broken/ None) [-5].

Sign Language

Sign language is also no longer a skill.

Sign languages generally only have one form

(signed), not two (spoken and written).

Native fluency thus only costs 3 points.

If you are deaf or mute, you have a native

sign language and a native written language

for no point cost – if you do not, it is worth

negative points, as explained above.

Quick-and-Dirty Social Background Conversion

Tech level and cultural familiarity are straightforward. Refer to the headings in the

main text and follow the directions there.

Languages involve more work, but may still be quicker to convert based on charac-

ter concept as recommended in the main text. For a truly dirty conversion that may be

marginally quicker, record each language you possess as shown in the table below. (The

point cost is given for reference; ignore it if you are not concerned with it.) Assume you

know your native language at a minimum skill of IQ+4, even if you don’t. Proficiency

levels separated by a slash are Spoken/Written.

3e Skill level

Literate

Semi-Literate

Illiterate

6 or less

Broken [2]

Broken/None [1]

7-12

Accented [4]

Accented/Broken [3] Accented/None [2]

13 or more

Native [6]

Native/Broken [4]

Native/None [3]

Subtract 6 points from the cost of your native language.

A DVANTAGES

Many Third Edition advantages map

directly to an advantage of the same name in

Fourth Edition. Many don’t. For quick refer-

ence on any changes to advantage names and

point costs, refer to the table. If there is an

annotation or asterisk (*), see the note for

that advantage for an explanation.

Quick-and-Dirty Advantage and Disadvantage Conversion

Look up each advantage and disadvantage you possess on the relevant table. If a

Fourth Edition equivalent is given, use that and ignore any additional notes. If the table

says to refer to a note, read the note to find out what the best equivalent is.

A DVANTAGE C ONVERSION T ABLE

3e Advantage

Cost

4e Advantage

Cost

3e Advantage

Cost

4e Advantage

Cost

360-Degree Vision

360° Vision*

Bardic Immunity

3D Spatial Sense

Beast-Kin

see note

Absolute Direction

Being of Pure Thought 210

see note

Absolute Timing

Bioelectric Shock

Innate Attack*

Absorption

Variable

Damage Resistance

5/level*

Bite

Vampiric Bite

Academic Status

5/level

Status*

5/level

Blessed

10 or 20

Blessed

10 or 20

Acceleration Tolerance 10

Resistant to

Body of Air

Alternate Form*

Variable

Acceleration (+3)

Body of Earth

Alternate Form*

Variable

Acute Faz

2/level

Acute Vibration Sense

2/level

Body of Fire

5/level

Alternate Form*

Variable

Acute Hearing

2/level

Acute Hearing

2/level

Body of Ice

Alternate Form*

Variable

Acute Taste and Smell

2/level

Acute Taste and Smell

2/level

Body of Metal

9/level

Alternate Form*

Variable

Acute Vision

2/level

Acute Vision

2/level

Body of Stone

8/level

Alternate Form*

Variable

Administrative Rank

5/level

Administrative Rank

5/level

Body of Water

Alternate Form*

Variable

Alcohol Tolerance

Bouncing

12/level

see note

Alertness

5/level

Perception*

5/level

Brachiator

Brachiator*

Ally

Variable

Allies

Variable*

Breath-Holding

2/level

Breath-Holding

2/level

Ally (Unwilling)

Variable

Allies

Variable*

Breathe Fire

Innate Attack*

Ally Group

Variable

Allies

Variable*

Broadcast

3/level

Radio*

Ally Group (Unwilling) Allies

Variable*

Cast Iron Stomach

see note

Altered Time Rate

100/level

Altered Time Rate

100/level

Catfall

Alternate Identity

5/15

Alternate Identity

5/15

Chameleon

7/level

Chameleon

5/level

Ambidexterity

Channeling

Amphibious

Charisma

5/level

Charisma

5/level

Animal Empathy

Animal Friend

5/level*

Chronolocation

Animal Form

100

Alternate Form*

Variable

Claim to Hospitality

1 to 10

Claim to Hospitality

1 to 10

Appearance (Attractive) 5

Appearance (Attractive)

Claws

Variable

Claws

Variable*

Appearance (Handsome) 15

Appearance (Handsome)

Clerical Investment

5/level

Clerical Investment*

Appearance

Clerical Magic

Variable

see note

(Very Handsome)

Clinging

20*

Armor Plates

Damage Resistance (3)*

Collected

Fearlessness (3)*

Autotrance

Combat Reflexes

Awareness

15/35

Detect*

30/50

Common Sense

G URPS U PDATE

3e Advantage

Cost

4e Advantage

Cost

3e Advantage

Cost

4e Advantage

Cost

Compartmentalized Mind 50/level

Gills

10/0

Doesn’t Breathe

10/0

Composed

Fearlessness (2)

(Gills, -50%)

Constriction Attack

Growth

10/level

Growth

10/level*

Contacts

Variable

Contacts

Variable

Hard to Kill

5/level

Hard to Kill

2/level

Cool (Mundane)

Fearlessness (1)

Harmony with the Tao 20

Wild Talent

20/level

Cool (Natural Attack)

see note

Healing

Healing*

Costume

Shtick (Costume)

Heir

see note

Courtesy Rank

1/level

Courtesy Rank

1/level

Hermaphromorph

Hermaphromorph*

Cultural Adaptability

see note

Hide

Variable

see note

Damage Resistance

3/level

Damage Resistance

5/level*

High Pain Threshold

Dampen

see note

High Technology

Variable

High TL

5/level

Danger Sense

Higher Purpose

Daredevil

Hyperactive

see note

Dark Vision

Hyperflight

50/75

see note

Deafen

see note

Hyper-Reflexes

see note

Decreased Life Support 10

Reduced Consumption

2/level*

Hyper-Strength

see note

Deep Sleeper

Ice Skates

Terrain Adaptation

Destiny

Variable

Destiny

Variable

Illuminated

Diplomatic Immunity

Image

see note

Discriminatory Smell

Immortality

140

see note

Discriminatory Taste

Immunity to Disease

Immunity to Sickness

Disease-Resistant

Resistant to Disease (+8)

Immunity to Poison

Divination Talent

Magery 0

Immunity to

(one spell only, -50%)

Timesickness

Divine Favor

Variable

Patron

Variable*

Imperturbable

Fearlessness (+5)

Doesn’t Breathe

Improved G-Tolerance 5/level

Improved G-Tolerance

5/level

(Oxygen absorption,

-25%)

Increased Density

5/level

see note

Increased Speed

25/level

Basic Speed

5/level*

Doesn’t Eat or Drink

Independently

15/level

Enhanced Tracking

5/level

Doesn’t Sleep

Focusable Eyes

Infravision

Dominance

20*

Infravision

Double-Jointed

Flexibility*

Inherent Magic (Knacks) Variable

see note

Drug Factory

see note

Injury Tolerance

Variable

Injury Tolerance

Variable*

Duplication

75/copy

Duplication

35/copy

Insubstantiality

Early Maturation

5/level

Feature

Interface Jack

see note

(Early maturation)

Intuition

Eidetic Memory

30/60

Eidetic Memory*

5/10

Intuitive Mathematician 25

Intuitive Mathematician*

Elastic Skin

Invisibility

Empathy

Empathy*

Invisibility to Machines 20

Invisibility

Enhanced Block

(Machines Only, -50%)

Enhanced Dodge

Invulnerability

Variable

see note

Enhanced Move

10/level

Enhanced Move

20/level*

Iron Hand

10/15

see note

Enhanced Parry

6/10

Enhanced Parry

5/10

Karmic Ties

Variable

see note

Enhanced Time Sense

Enhanced Time Sense*

Language Talent

2/level

Language Talent*

Extended Lifespan

5/level

Extended Lifespan

2/level

Laser

Innate Attack

Extra Arms

10/arm

Extra Arms

10/arm*

Legal Enforcement

5/10/15

Legal Enforcement

5/10/15

Extra Encumbrance

Lifting ST

3/level*

Powers

Extra Fatigue

3/level

Fatigue Points

3/level

Legal Immunity

5/10/15/20 Legal Immunity

5/10/15/20

Extra Flexibility

see note

Less Sleep

3/level

Less Sleep

2/level

Extra Hit Points

5/level

Hit Points

2/level

Light Hangover

No Hangover*

Extra Legs

Variable

Extra Legs

Variable*

Lightning

Innate Attack

Extra Life

25/life

Extra Life

25/life

Lightning Calculator

Extra Stun

Variable

see note

Literacy

0/5/10

see note

Faerie Empathy

see note

Longevity

Faith Healing

Healing*

Luck

15/30/60

Luck

15/30/60

Familiar

Variable

Allies

Variable*

Lunar Influence

see note

Fashion Sense

Lycanthropic Dominance 5

Dominance

20*

Favor

Variable

Favor

Variable*

Magery

15+10/level Magery

5+10/level*

Faz Sense

Vibration Sense

Magic Resistance

2/level

Magic Resistance

2/level

Fearlessness

2/level

Fearlessness

2/level

Magical Aptitude

15+10/level Magery

5+10/level

Field Sense

Detect

Magnetic Sense

5/level

Detect (Magnetic Fields)*

(Electric and

magnetic fields)

Mana Damper

Variable

Mana Damper

10/level*

Mana Enhancer

Variable

Mana Enhancer

50/level*

Filter Lungs

Manual Dexterity

3/level

High Manual Dexterity

5/level

Fit

Mathematical Ability

Mathematical Ability 3

30*

Flash

see note

Matter Surfing

see note

Flexibility

Double-Jointed*

Mechanical Telepathy

120

see note

Flight

Medium

Fugue

see note

Metabolism Control

5/level

Metabolism Control

5/level

Full Coordination

50/attack

Extra Attack

25/attack

Microscopic Vision

4/level

Microscopic Vision

5/level*

Fur

Variable

see note

Military Rank

5/level

Military Rank

5/level

Gadgeteer

25/50

Gadgeteer

25/50

Mimicry

Mimicry*

G-Experience

1 to 10*

Mindlink

1/level

Mindlink

Variable*

Mindshare

Variable

see note

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