GURPS - Compendium 1..

one-handed task (e.g., swinging a sword) at the same time. He
could not aim two weapons unless he had Independently
Focusable Eyes (see p. 58).
A creature with multiple arms can use all of them in concert
during normal situations (to repair a watch, for example), or
during instinctive actions such as grappling in close combat or
catching a thrown object. The ability to make multiple combat
actions of other kinds is paid for separately, however (see the
Full Coordination advantage, p. 56).
Close Combat with Extra Arms
Extra arms give a huge advantage in close combat. You cannot
punch with more than one arm at a time unless you have Full
Coordination (p. 56). But you may grapple with all at once. Every
extra arm (of regular length or longer), over and above the
generic set of two, gives a +2 on any attempt to grapple or pin,
or to break free from a grapple or pin. Other limbs do not help.
Extra Encumbrance
5 points
You have a "load-bearing frame" and can carry more than a
normal human of the same ST could. Light encumbrance is
defined as 5 x ST, Medium as 10 x ST, Heavy as 20 x ST, and
Extra-Heavy as 30 x ST.
Extra Fatigue
3 points/level
See Extra Fatigue, p.24. The GM may allow a race that has
both powers that utilize Fatigue (e.g., magic or psionics) and a
racial penalty to ST (i.e., a racial average ST of 9 or less) to buy
Extra Fatigue that applies to those powers only. This costs 2
points per Fatigue point, to a maximum racial average Fatigue of
12.
Extra Flexibility
5 or 10 points
Arms may be designed for great flexibility compared to
human arms. They may be tentacles, or they may just be multijointed.
Such arms are not necessarily strong or weak, nor are
they necessarily dexterous or clumsy; those abilities and disabilities
are bought separately.
The effect of this is simply that any arms that can reach each
other can work together, regardless of body positioning, general
layout, or "right" and "left."
Cost is 10 points (for the whole creature), or 5 points (for a
single limb, for example an elephant's trunk).
Extra Legs
Variable
If a limb cannot manipulate, but can be walked on, it is a leg.
The "default" number of legs is two. A leg is assumed to be able to
kick with a range of 1, doing thrust/crushing damage. Each
additional hex of range costs 10 points. Extra damage is purchased
per Strikers, (p. 66). If the legs can't kick for damage,
reduce the total leg cost by 5 points.
Three or four legs cost 5 points; if the character loses a leg,
he can continue to move at half-speed (round down). Loss of a
second leg causes him to fall.
Cost to have five or six legs is 10 points. Each leg lost reduces
speed by 2 until only three legs are left. At that point, speed is
reduced to 2. Loss of one more leg causes the character to fall.
Cost to have seven or more legs is 15 points. Each leg lost
reduces speed by 1 until only three legs are left. At that point,
speed is only 2. Loss of one more leg causes the character to
fall.
Feet Manipulators
Any limb which can manipulate should be purchased as an
arm (see Extra Arms, p. 54) - the fact that the character walks on
it is merely a special effect.
Faz Sense
10 points
The term "faz" is specific to the Thranx in the Humanx universe,
but any creature equipped with vibration-sensitive antennae
may possess this sense.
The sense of faz allows you to detect the location and general
size of objects by sensing atmospheric vibrations. It is not a substitute
for vision, though. You can find an opponent in the dark
more easily than a human could, but you cannot detect colors,
nor can you sense details - such as what specific weapon a foe is
carrying. In a perfectly still, dark chamber, you will have only a
vague idea how large the room is, but you will be able to faz a
wall before you run into it. You can easily find any doors or
vents by sensing the air moving in or out of the room.
To use faz, roll vs. IQ as for any other sense, with the following
modifiers:
Range: Use the Range modifier on p. B201. More distant
objects are harder to detect.
Size: Use the Size modifier on p. B201. Larger objects are
easier to detect.
Relative speed: Assign a relative Speed bonus as per p.
B201; moving objects are much easier to detect than stationary
ones.
Wind speed: Assign a Speed penalty (based on wind speed),
as per p. B201, for winds over ten mph.
A successful faz roll indicates the general size, location,
speed and direction of movement of an object. It will not usually
reveal any information about the object's shape. Once you have
fazzed something, you may target it with a ranged or melee attack,
taking the same penalties on your to-hit roll as you did on the
faz roll (but never a bonus).
The faz roll is affected by Alertness and "Acute Faz" (an
advantage costing 2 points per +1).
Field Sense
10 points
You can detect and orient to electromagnetic fields. You
automatically have Absolute Direction on any planet with a
magnetic field. You can also (for instance) sense whether power is
flowing through a device. The power flow from an A cell could
be detected at 1 hex, a B cell at 10 hexes, a C cell at 100, and so
on.
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