Wednesday, August 14, 2019

Simple Skills System (Revised)

TLDR: an idea for implementing simple skills in pre-2e D&D. 

Each character details their background in 50 words or less, using full sentences. This background can be revised between adventures to incorporate an extra sentence per level gained.

When a character attempts something that would require unusual skill, and the GM agrees that it is possible, even if it’s very unlikely, he sets a difficulty at 4, 5, or 6 and indicates the most-closely related ability.

The player then rolls dice as follows, trying to meet or beat the difficulty on at least one die.

  • 1d6 if unskilled
  • 2d6 if skilled (character background suggests a related skill) OR the related ability has a positive bonus
  • 3d6 if skilled AND the related ability has a positive bonus

The odds to work out to be:

  • 1d6 ≥ Dif. 4 = 50%, Dif. 5 = 33%, Dif. 6 = 17%
  • 2d6 ≥ Dif. 4 = 75%, Dif. 5 = 56%, Dif. 6 = 31%
  • 3d6 ≥ Dif. 4 = 88%, Dif. 5 = 70%, Dif. 6 = 42%

If all the dice show a 1, the failure is a “botch” and is worse than a normal failure, if that’s possible. “Extra” successes usually add minor positive benefits.

Example

A player wants his character to run at full speed across a tightrope between high buildings to escape pursuers. . 

The GM says, "that will be a difficulty 5 DEX test." Note that the GM wouldn't necessarily have to call out the difficulty; that's probably a matter of style. The GM should not consider the character's skill at all when setting difficulty. Rather the difficulty should be solely based on the situation. Is there strong wind and rain? Is the character carrying a lot of stuff? How hard would it be for a normal person to do this given the situation?

The character has a positive DEX bonus and, according to his background, was once a circus performer, so he rolls 3d6. If the highest die in that pool is a 5 or 6, the character succeeds. If two or three successes show, perhaps he gets across at high speed and can get out of sight before the pursuers catch up. Or he has plenty of time to cut the rope and not get shot at by crossbows.  

If the highest die is less than 5, he fails. The GM might allow him to catch the rope or a ledge on the way down, but the character will be in dire straights.

If all three dice show a 1, the character plummets to the ground with no chance at grabbing the rope. If he survives, the pursuers probably had people tracking him on the ground as well. 

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