d20 Under Stat

Fading Suns

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

Hero Wars/HeroQuest

Roll 1d20 under any relevant Ability’s score:

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).

PenDragon

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.