d20 OtherWorld Creations Firearms.pdf

D20 FIREARMS

The Deinitive d20 Guide to Guns

By :

Ken Hood

Additional Material :

R. Hyrum Savage

Editing :

R. Hyrum Savage

Layout and Design :

R. Hyrum Savage

Produced By :

OtherWorld Creations

www.otherworlds.cx

The OtherWorld Creations logo,

is a Trademarks of OtherWorld Creations.

Coast, Inc.

This book requires the use of the Players Handbook, Revised, Copyright Wizards

of the Coast®. Used with Permission.

All content not specifically called out as Product Identity is OPEN.

D20 FIREARMS

(It also means that if you have a society

with plentiful, cheap firearms, it probably

will not be able to support an elite social class

of warriors. Firearms equalize death-dealing

potential. Jealous peasants with guns can

make mincemeat of aristocracy.)

FIREARMS

Firearms play an integral part in any modern

setting. Although not as deadly as in real

life (modern heroes routinely run through a

hail of bullets, either not getting hit or not

being seriously injured), the rules below are

a simple and effective way of introducing

firearms into any setting.

ACCURACY

The bullet fired from a gun travels far faster

than an arrow, sling stone, crossbow bolt,

or hurled knife. In comparison to these

weapons, it has less need to “lead” a target

(i.e., aim in front of it) at long ranges. To all

practical means, a bullet is invisible because

of its speed and moves so fast as to be nigh

impossible to dodge. It is easy to aim and

capable of precise targeting at relatively long

ranges. Wind, rain, and other environmental

effects do less to spoil its trajectory in

comparison to more primitive weapons.

For these reasons, this system gives

firearms an attribute called Accuracy. A

firearm’s Accuracy is a modifier to Attack rolls

when a character uses that gun.

Normally, a firearm has an Accuracy

modifier of +2. A weapon’s recoil and other

special attributes can reduce or increase its

base accuracy.

FIREARM ATTRIBUTES

Firearms have several special traits that

make them different from other weapons,

particularly muscle-powered weapons, like

the crossbow and sword. These traits are

discussed below.

CHEMICALLY PROPELLED

Unlike bows, slings, and crossbows, which

use mechanical, muscle-based force to hurl

a projectile, firearms rely on simple chemical

combustion. The propellant detonates,

transforming into a gaseous state. The gas

expands, forcing the bullet down the barrel of

the weapon. The bullet (and some of the gas)

escapes the end of the barrel in excess of the

speed of sound, with a loud crack and flash.

The only practical limit to the velocity

of the bullet is the rate at which gases can

expand. This is quite unlike more “primitive”

muscle-powered weapons that are limited by

the strength and skill of the user. Regardless

of who wields the firearm—from a withered

crone to an Austrian bodybuilder—the bullets

come out with the same force and inflict the

same damage.

What does this mean for a d20 game?

Basically, a character does not apply his

Strength bonus to the damage inflicted by a

firearm.

RECOIL

When a gun is fired, it is pushed backward

toward the shooter, and the muzzle pitches

upward. This is called recoil or “kick.” Recoil is

the gun’s reaction to its action of propelling a

bullet.

Generally speaking, the lighter the

firearm, the more it kicks. The more powerful

a round fired by a gun, the more the recoil.

The shorter the barrel, which causes more

propellant gas to be wasted, the greater the

recoil.

The more powerful a firearm’s recoil,

the less accurate the firearm. When fired

rapidly, recoil spoils the aim of the shooter,

driving the barrel up and off target.

D20 FIREARMS

In this system, a single number

designates Recoil. The caliber of the round,

size of the propellant, and size of the firearm

determine it. Accessories, like a muzzle brake,

can reduce that number.

The effects of the Recoil attribute are

described below.

Because firearms shoot small

projectiles faster than the speed of sound,

they can punch through solid objects with

ease. This attribute is called Penetration. It

is the ability of a firearm to ignore armor.

Penetration permits a weapon to ignore a

few points of Damage Reduction when it

determines its damage. Firearms typically

have Penetration from 4 to 8.

RECOIL AND RAPID FIRE

In this system’s simplified model of firearms,

Recoil applies a negative penalty to your

attack rolls when you attempt to fire a gun

rapidly. When you fire faster than single fire,

you’re going to suffer the effects of recoil. The

exact effects are described in each rate of fire

below.

RATES OF FIRE

With a modern, self-loading firearm, you can

fire several shots during the time of a single

typical sword swing or thrust. Pumping out a

veritable cloud of lead is nothing more difficult

than rapidly pulling the weapon’s trigger. To

simulate this in play, several new Rates of

Fire have been created. Using a weapon with

a special Rate of Fire lets you shoot several

times with a single attack action.

These new Rates of Fire are designed

with the KISS principle in mind: “Keep It

Simple, Stupid.” While more accurate ways

of modeling fully automatic fire exist, they

require a high degree of rule complexity,

bogging down the play of the game. These

rules attempt to model automatic fire and still

maintain the game-quickening abstraction that

underlies the rule system.

Certainly there are more types of burst

fire in the “real world”, but for purposes of

this system, only three-, five-, ten-, and fifty-

round bursts have been created. Again, this

keeps things simple.

HEAVY RECOIL

If a weapon has Recoil of 4 or more, it

is considered to have heavy, brutal kick

when fired and suffers a negative penalty

to Accuracy. Table 1 shows the Accuracy

penalties for different degrees of Recoil:

Table 1: Accuracy Penalties for Recoil

Recoil

Accuracy Modiier

3 or less

4-5

–1

6-7

–2

8-9

–3

10+

–4

PENETRATION

In the 1850’s, a black-powder rifle, the Swiss

Federal carbine, was capable of firing a 10.5

mm ball with such force that it could “pierce

three one-inch thick wooden boards at a

thousand paces” (quoted from The World’s

Great Rifles , by Roger Ford). Late 20th-century

cartridge firearms are capable of penetrating

24 or more layers of ballistic Kevlar, the

material used to make “bullet-proof” vests. It

is not uncommon for accidentally discharged

firearms to punch holes through the walls

of several houses in a row. Even firearms of

moderate caliber can punch through the metal

bodies of automobiles; some are even capable

of piercing the engine block.

STANDARD FIRE (SF)

Standard fire allows you to attack with a

firearm as many times as you have attacks

per round.

Almost every firearm permits you to

perform standard fire. There are exceptions,

though. For instance, certain machine guns

and submachine guns let you fire bursts only.

D20 FIREARMS

Recoil 3 imposes a –3 penalty to Jack’s

attack rolls in triple fire mode.

The first attack would normally be

+8. With triple fire, it is three shots at

+5/+5/+5.

The second attack would normally be

a single shot at +3, but with triple fire it is

three shots at +0/+0/+0.

Jack gets six attacks:

+5/+5/+5/+0/+0/+0.

DOUBLE FIRE (DF)

Double fire lets you fire two shots with each

attack. Each shot suffers a penalty to hit

equal to half the weapon’s recoil (round up,

–1 minimum).

Double fire may be directed at two

separate targets. This imposes a –4 penalty

to hit both targets.

Damage bonuses for specialization and

the like apply to each shot you perform with

double fire.

3-ROUND BURST (B3)

A burst occurs when several bullets are rapidly

and automatically fired with a single pull of a

firearm’s trigger. The advantages of a burst

are that it is easier to hit your target, and it is

possible that you might hit your target with

more than one bullet, inflicting more damage.

A 3-round burst counts as one attack;

three bullets are fired with a single pull of

the trigger. If you perform a standard attack

action, you can do one burst. If you perform a

full attack action, you can perform one burst

for each attack.

A 3-round burst provides a +3 Attack

bonus.

For every (2 + Recoil) points you roll

over the number needed to hit your target,

an additional bullet hits and inflicts normal

damage, up to the total number of bullets

fired at your target. Resolve the damage of

each bullet separately. (For example, if you

use a Recoil 3 weapon, for every 5 points you

roll higher than the amount needed to hit your

target, another bullet hits and inflicts damage.)

You cannot hit an opponent more times

than the shots in your burst. For instance, if

you fire a three-round burst,, no more than

three shots can hit your target.

You cannot direct a three-round burst at

multiple targets.

Damage bonuses for specialization and

similar abilities apply to the first bullet in a

burst, but not any others.

Double Fire Example

Jack has an Attack bonus of +8/+3. He

wields a double-action revolver with Recoil of

3. Jack decides to double fire on both of his

attacks.

One-half the recoil of his revolver is

1.5. This is rounded up to 2, so Jack suffers

a –2 penalty on his attacks.

The first attack would normally be +8.

With double fire, it is two shots at +6/+6.

The second attack would normally be

a single shot at +3, but with double fire, it is

two shots at +1/+1.

Jack gets four attacks:

+6/+6/+1/+1.

TRIPLE FIRE (TF)

Triple fire lets you shoot three times with

each attack. Each shot suffers a penalty to hit

equal to the weapon’s recoil (–2 minimum).

As with double fire, triple-fire shots

may be directed at separate targets, but with

a –4 Attack penalty against each target.

Damage bonuses for specialization and the

like apply to each shot.

Double-action weapons and auto-

loaders are capable of triple fire.

Triple Fire Example

Jack has an Attack bonus of +8/+3. He

wields a double-action revolver with Recoil of

3. Jack decides to triple fire on both of his

attacks.

Point Blank Burst: If you fire a burst at a

target within 5’ and hit, all bullets in the burst

automatically hit the target.

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