GURPS - Compendium 1..

Many special enhancements and limitations for particular
advantages and disadvantages are listed in Chapters 2 and 3.
The selection below is "generic" and can be applied to most
racial and super abilities, as well as to any mundane abilities the
GM wishes to permit to be modified. The GM may reject any
combination that seems silly!
ENHANCEMENTS
See GURPS Supers for enhancements that apply specifically
to super -powered attacks, such as Armor Piercing and Rapid
Fire. GURPS Psionics contains several psi-specific enhancements
as well.
Affects Insubstantial +20%
The ability will affect insubstantial beings in addition to normal,
substantial things.
Affects Others +40%
This enhancement is only available for advantages. The normal
effect is that the user may now roll vs. DX and make a normal
"ranged attack" (SS 12, Acc 1, 1/2D 5xHT, Max l0xHT) against
anyone, to give them the ability to use the enhanced
advantage. For instance, if you have Invisibility with Affects
Others, you may roll as though you were attacking someone
with a ranged power. If you succeed, they will not automatically
become invisible, but they may become invisible, staying invisible
until your duration expires - normally one second per point of
your HT. This may be increased with Extended Duration.
If Affects Others is combined with the Area Effect or Wall
enhancements (or the Touch Only limitation), it can be used on
those in the area, or the person touched, without a roll.
Affects Substantial +40%
The ability will affect substantial objects even if the user is
insubstantial. It will also affect insubstantial creatures normally.
This is a very powerful enhancement, as it allows insubstantial
PCs to become virtually "unkillable." The GM should feel free
to disallow it, restrict it to NPCs, or to make sure that lots of foes
have the Affects Insubstantial enhancement.
Area Effect +50%
This allows a ranged ability to be used as an area power
(with a radius equal to HT/5 hexes). The Affects Others
enhancement must also be purchased for an advantage to be
used as an area power. If the ability is normally resisted, everyone
in the area gets a resistance roll versus it.
See also Increased Area, Movable Area, Selective Effect and
Wall.
Extended Duration +30%
A power enhanced in this manner lasts twice the normal
duration. This may be purchased as many times as desired, each
enhancement doubling the duration again. This can't be bought
for attack powers, nor can advantages and disadvantages be
enhanced with it unless they also have the Affects Others
enhancement.
Increased Area +20%
Each level of Increased Area adds 1 to the radius of an area
power (including non-area abilities enhanced with Area Affect).
Instantaneous +20%
This ability does not require a turn of concentration. You are
still limited to using one power (spell, psi ability, etc.) per turn,
but you may now use your ability and then take a full normal
move or hand-to-hand attack. When bought for an advantage,
this allows it to be turned on instantly.
Link +10%/+20%
This enhancement allows two or more abilities to be used
simultaneously, as if they were a single ability. For +10%, the
abilities are permanently linked into a single power, and cannot
be used separately. For +20%, they can also be used separately.
The enhancement must be applied to all the abilities in question.
Movable Area +40%
Any area power with this enhancement can be "attached" to a
person or other moving object, allowing the area to move with
that person.
No Obvious Effect +10%/+20%
Physical powers enhanced by this have no visible effect associated
with them. Magical powers cannot be sensed magically,
while psi powers leave no psionic signature, etc. If the power is
totally undetectable by any means, the enhancement is worth
+20%. If can be sensed or detected, but at -4, it is worth only +
10%.
Reduced Fatigue Cost +20%
This only applies to abilities that cost Fatigue. Each time you
buy Reduced Fatigue Cost, it cuts the Fatigue cost of the ability
by 1 per turn. You may buy it any number of times.
Selective Effect +50%
Applied to an area power, this lets the user select which targets
are actually affected by the ability. This lets you use an
advantage with Affects Others and Area Effect to aid friends
without also aiding foes.
Wall +30%
An area power can be set up as a line of hexes, filled with the
substance or effect of the Wall, affecting anyone or anything
passing through it. For every 1-hex radius in your area, you get a
3-hex-long (nine-foot) wall. Advantages modified with this
enhancement create 1 hex per 2 points of HT.
If you buy this enhancement twice, you can form the Wall
into any shape you choose.
A physical Wall created with this enhancement will stop
attacks as though it had been created normally. A non-physical
Wall must have the Affects Others enhancement to protect anyone
except the user.
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