@Hero & Walking Dad.
You roll percentile dice and you try to roll under a target number. the lower you roll, the better. The higher the target number the better. You add bonusses and penalties to your target number, not your roll.
Targets are based on your attributes.
Basic skills have a target number of half your stat.
Learned skills have a target number of your full stat.
You start the game with basic and learned skills, and use XP to buy more.
Talents allow you to bend the rules or give you bonusses on certain skills or against certain attacks.
To shoot at someone, roll under your ballistic skill +/- bonus. If you hit, you do damage. Damage location is based upon the reverse of your attack roll. Subtract armor and toughness from the attack. If you have leftover damage, their wounds are reduced. Wounds below zero kills minions, specials and players start to suffer from crit damage.
If you have the dodge skill you can spend a reaction to dodge an attack. You only have one reaction per round. If you are attacked in melee and you have a weapon you can parry by rolling under your weapon skill. This also costs a reaction.
That's it.

Simple
[sblock=Kelly Kincaid]
Kelly Kinkade
Home world: Hive world
Hive World skills: Language (Hive Dialect),
Hive World Traits:
Accustomed to Crowds: Crowds are normal terrain and when running/charging through dense crowd take no penalty to Ag tests
Caves of Steel: Have tech-Use(int) as a basic skill
Hive Bound: take a -10 penalty to all survival(int) tests out of "proper hab" and -5 to all Int tests
Wary: +1 to Init tests
Wounds: 14
Fate Points: 2
Wealth: 25 Throne Gelt
Divination: "Thought Begets Heresy. Heresy Begets Retribution"
Characteristics:
Weapon Skill (WS) 40 (30 pts)
Ballistic Skill (BS) 35 (15 pts)
Strength (S) 41 (18 pts+3 Divination)
Toughness (T) 40 (30 pts+5 Simple Advance)
Agility (Ag) 38 (18 pts)
Intelligence (Int) 30 (5pts + 5 SA)
Perception (Per) 25 (5 pts)
Willpower (WP) 25 (5 pts)
Fellowship (Fel) 29 (4 pts)
Career Path: Arbitraitor
Skills:
Starting:
Speak Language (Low Gothic)(Int)
Literacy (Int)
Common Lore(Adeptus Arbites)(Int)
Common Lore(Imperium)(Int)
Advance:
Awareness (Per)
Tracking (int)
Tech Use (Int)
Security (ag)
Talents:
Starting:
Melee Weapon Training (Primative)
Basic Weapon Training (SP)
Quick Draw
Advance:
Sound Constitution
Starting Equipment:
Shotgun+Red Dot sight upgrade and 12 shells
Sword+Mono Upgrade
Mesh Vest
Uniform(Good Quality Clothing)
3 does of Stimm
Injector
Arbitrator ID
Build: Lanky
Age: Youth (20)
Skin: Fair
Hair: Black
Eyes: Orange
Sex: Female
Quirk: Bullet wound scar
Hive Class: Specialist
Starting Rank: Trooper
900 xp to spend:
Trooper
Awareness: 100 xp
Simple Toughness Advance +5 100
Sound Constitutionx2 200
Intelligence SA 100
Enforcer
Tracking 100
Tech Use 200
Security 100[/sblock]
[sblock=Brutis]
Brutus Drake. A.K.A. Fist
Home world: imperial world.
Imperial World Traits:
Blessed ignorance: your wise blindness imposes a -5penelty on forbidden lore (int) tests.
Hagiography: imperial worlders treat common lore(imperial creed) (int), common lore (imperium) (int), and common lore (war) (int) skills as basic skills.
Liturgical familiarity: imperial worlders treat literacy (int) and speak language (high gothic) (int) as basic skills.
Superior origins: increase your will power by +3
Characteristics:
Weapon Skill (WS) 20 world + 20 +5 SA = 45
Ballistic Skill (BS) 20 world + 20 +5SA = 45
Strength (S) 20 world + 15 (+5 for simple upgrade) = 40
Toughness (T) 20 world + 20 = 40
Agility (Ag) 20 world + 15 = 35
Intelligence (Int) 20 world + 10 = 30
Perception (Per) 20 world + 10 = 30
Willpower (WP) 20 world + 10 +3 home world= 33
Fellowship (Fel) 20 world + 0 = 20
Wounds: roll 3+ world 8+ 2 divination + 1 talent= 14
Fate Points: 2
Wealth: 71 Throne Gelt
Divination: "the only true fear is of dyeing with your duty undone." +2 wounds.
Career Path: guardsmen
skills:
Speak Language (Low Gothic)(Int)
drive ground vehicle (Ag)
Awareness (per)
Dodge (Ag)
talents:
basic weapons training (SP)
basic weapon training (las)
melee weapon training (Primitive)
pistol Training (Las)
Pistol training (SP)
True Grit
Equipment:
Explosive collar (still attached)
Tattered prison outfit. (common quality)
Unknown.
Build: well-built (1.93m/92Kg)
Age: stripling (26)
Skin: Tan
Hair: Grey
Eyes: Grey
Sex: Male
Quirk: barcode on forehead. (This shows he is a penal legionnaire)
Conscript
Strength simple upgrade 100
Awareness 100
Pistol training (SP) 100
Sound constitution 100
Weapon Skill SA 100
Guard
Ballistic skill SA 100
True Grit 200
Dodge 100
[/sblock]
I'll start you guys up at the Arbites Fortress when you give me the go.
Btw, I'm reading
Enforcer right now. On the whole the WH40K fiction is actually quite decent to very good, and so far I'm enjoying it immensely.