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About this blog

This blog discusses and explains decisions made in the process of creating the BRP/Questworlds/Pendragon mashup game system, or glorified house rules that I call Rivers of Sartar.

All images are from wikimedia, diagrams are by the author.


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Entries in this blog

Background: Dice Probability Tables

Questworlds is Chaosium's rules and prep-lite RPG system. Fundamental to it is the opposed roll, in which a skill is rolled against a resistance, using  'highest rolled value  as a tiebreak i both rolls succeed. The produces a table of probabilities that looks like this:   This table skill on the left, and resistance on top. Both are unrolled so 22 is 42.  This table has 2 key desirable properties: thanks to the tiebreak rule, it almost always (at least 95% of the time) p

Introducing Rivers of Sartar

There are many BRP-derived, Runequest-inspired fantasy role-playing game systems; ones I am aware of include Mythras, OpenQuest, SpeedRune, SimpleQuest, Revolution D100, Jackals and Legend. This is mine[1]. For people who are not me, it's main selling point is that it is a unofficial adaptation of some of the principles behind the QuestWorld game engine to Chaosium's world of Glorantha. In particular, it changes certain aspects of the QuestWorlds core mechanics to support the direct us
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