Table of Contents

One-Roll Engine

When needing to resolve a specific action or a certain outcome has a need to be determined, you roll a dice pool of d10s. The size of the pool is determined by which STAT and SKILL is in question:

  • If a person needs to outrun an angry mob, a roll of BODY+Running is appropriate.
  • If a person needs to persuade a hostile individual to not harm them, a roll of CHARISMA+Persuasion is appropriate.
  • A dice pool can never have more than 10 dice in it. If a combination of stats and skills exceed 10, the extra dice can be used to offset penalties, but not be rolled.

How to interpret the roll?
You look for matching sets of numbers. If you have even a single matching set, your action is successful. But the WIDTH and HEIGHT of the set can have huge impact on the outcome.

  • The WIDTH of the set is how many dice ended up with the same number. The WIDTH determines how fast the action is resolved, and is used for damage and initiative in combat.
  • The HEIGHT of the set is how high those numbers are. The HEIGHT is determines the quality of the action and determines Hit Location in combat, and solves initiative ties.

For example: If a person with 4 in the BODY stat and 3 in the Fighting skill needs to hit someone with a bat, that person rolls 7d10.
If he rolls the seven dice and gets 1,1,1,4,5,7,7,10, there are two matching sets, the three 1's (abbreviated 3×1) and the two 7's (2×7).

Special Dice
There exists two different special dice that can show increased control and finesse with a skill. These are called EXPERT DIE and MASTER DIE. They can only be applied to a SKILL, not a STAT and each SKILL can only have 1 special dice.

  • EXPERT DIE are upgraded from a normal skill die and lets you set that die to a number of your choice before you roll the rest.
  • MASTER DIE are upgraded from an EXPERT DIE. You set it aside before you roll the rest, and then set that die to a number of your choice.

Some nerdy stuff to look at

Size of Dice Pool Odds of one or more matches
2d 10%
3d 28%
4d 50%
5d 70%
6d 85%
7d 93%
8d 98%
9d 99,6%
10d 99,9%

These are all taken from NEMESIS, another book using the One-Roll Engine.

Stats and skills

Stats BODY COORDINATION SENSES KNOWLEDGE CHARISMA
Skills Athletics Acrobatics Direction Chemistry Barter
Endurance Climbing Hearing Electronics Bluff
Fight Dodge Scrutinize Explosives Fascinate
Martial Arts Driving Sight First Aid Graces
Parry Escape Artist Sixth Sense Forgery Inspiration
Run Lockpick Smell Mechanic Intimidation
Swimming Pick Pocket Taste Medicine Leadership
Vigor Stealth Touch “Student of” Persuasion
“Weapon skill” Tactics Seduction

FLEXIBLE skills

Expert Perform
Examples:
Expert Hacker
Expert Banker
(is usually a KNOWLEDGE skill)
Examples:
Perform Acting
Perform Singing
(is usually a CHARISMA skill)


Character Creation

1. Character Concept: Talk with the group and find out together what kind of character you want to bring to the table.

2. Buy stats and skills. You have 80 XP to buy for.

3.