Herein I muse about dice mechanics.

2d6 (Toonish)

• Traits range from 3–10
• Roll: 2d6 ≤ trait (+ modifiers)
• Double indicate an exceptional result
• In contests, the “better” result wins
  (exceptional success > normal success > normal failure > exceptional failure)

d6 − d6 (similar to Feng Shui?)

• Traits range from 0–10
• Difficulties range from 0–10
• Roll: trait + d6 − d6 ≥ difficulty
• (Before rolling, declare which die is “positive” & which is “negative”.)

d% (BRP & Pendragon)

• Traits are rated 1–100
• Roll: d% ≤ trait (+ modifiers)
• For contests: The highest roll that doesn't fail wins

d5

This is verbose to explain, but it's actually pretty simple. (& it could use a better name.)

• If trait ≥ difficulty, success is automatic
• Roll 2d6
• Read 6s as zeros
• Drop the higher die
• If double-5s were rolled, roll again & add
• If total is ≥ difficulty, the attempt is a success

e.g. Trait = 3, difficulty = 10. Roll 2d6: 5 & 5. Roll again: 3 & 4. Drop the higher. Add 5 for the 1st roll & 3 for the 2nd roll to 3 for the trait for a total of 11. This is ≥ the difficulty, so the attempt is a success.

e.g. Trait = 3, difficulty = 4. Roll 2d6: 6 & 6, which is really: 0 & 0. 3 + 0 ≱ 4. The attempt fails.

d2 pool (Prince Valiant)

• Roll any sort of (normal, even-sided) dice
• Even is 1; odd is zero
• Roll a number of dice equal to skill level
• If all dice come up even, roll one bonus die

DP9 (Dream Pod 9)

• Roll a number of d6 equal to skill level
• Drop all but the highest
• Additional 6s add +1 each
• Attributes ranged from −5 to +5

Rule of 5 The Rule of 5 RPG

• Roll 2d6
• If the total ≥ 5: 1 success
• If the total ≥ 10: 2 successes
• If either die shows a 5: 1 success

You can have a total of 4 successes on one roll.

Probabilities:

Successes	Chance	%
0	6:36	16.7
1	16:36	44.4
2	11:36	30.6
3	2:36	5.6
4	1:36	2.8

last updated 2 years ago #