d20 roll + modifiers vs. a target number
d20 roll + Skill or Attribute Rating - Degree of Difficulty; compare to Action Table for result.
Roll 1d20 under the sum of an attribute and a skill, then determine your victory points according to your roll by reading a table (the higher, the better). If your die = success chance number, you scored a critical success : multiply victory points by 2
Roll 1d20 under any relevant Ability’s score:
- On a 1, you score a critical success.
- On a 20, you score a critical failure.
Then, shift quality of success by the number of masteries you have in the ability (with 1 Mastery, Success becomes Critical Success and Failure becomesSuccess).
Roll 1d20 under either a skill or a characteristic, depending on the situation. If your die = success chance number, you scored a critical success.
The Black Hack
Roll 1d20, under stat to succeed.