Tri-Stat dX Weapon Focus optional rules
By Zegon Destructacon, special thanks to Ardweden and Brett

This is a revision for the standard Combat Skills section.  In this variant
ruleset, specializations are much more specific and weapon skills are,
likewise, very specific.  To apply the Weapon Focus skillset revision to your
game, it is important to split the weapons into their respective categories.
Listed below are the categories for weapons given in the base Tri-Stat dX book,
and where the weapons fit.  A weapon specialization is a specific type of
weapon, while the category is a slightly broader range of that weapon.

Skill: Specializations/weapons
Archery: Longbow, Crossbow
Pistols: Light/Medium Pistol, Heavy Pistol, Magnum Revolver/Revolver,
  Machine Pistol, Taser, Blaster Pistol
Rifles: Heavy/Assault Rifle, Heavy Shotgun/Shotgun, Sniper Rifle, Huynting/Light
  Rifle, Blaster Rifle
Auto-Fire Heavy Arms: Light/Heavy Minigun, Submachine Gun, Machine Gun
Artillery: By weapon, Tomahawk Missile
Gunnery: By weapon
Launchers: LAW, Gernade Launcher, 120mm Heat/120mm Sabot, Stinger Missile
Bladed: Axe, Broadsword/Longsword, Wakizashi/Shortsword, Katana/Bastard Sword,
  Greatsword, Greataxe
Pole-Arms: Naginata, Spear, Halberd, Ransuer
Flexible: Chain, Flail, Whip, Nunchaku
Blunt: Mace, Bo/Staff, Baseball Bat/Club
Shields: Small, Large, Energy
Thrown: Dagger, Lethal Gernades, Non-Lethal Gernades, Rocks
Improvised Melee: Baseball Bat, Folding/Chair, Stop Sign, Fireplace Poker,
  People, Pepper Spray
Improvised Thrown: Flask, Monitor, Rock, Lightbulbs, People
Massive Melee: Park Bench, Dumpster, Steel Girder, Telephone Pole, Buses
Massive Thrown: Manhole Cover, Cars
Unarmed Attack: Holds, Strikes, Throws, Grappling

Skill costs for each category should go down by one SP per level, but never
below 4 SP/level.  According to your game world, you may eliminate or add
categories as you see fit.  In general, each category should have at least
three specializations in it.  In the case of worlds where particular weapons
are rare, (swords in a hard SF setting, for instance), skills may be merged
together to make them more viable for purchase and use.

Defense skills also undergo a slight change.  Close-ranged combat is now one
skill entirely, and your defense specialization bonus is determined by what
weapon you're using.  The specialization should be taken just like the above
ones, with a very specific type of weapon.  Ranged combat users may take their
own specialization called 'Unarmed', as can unarmed characters.