3d8 Probability Calculator
Explore exact odds for each Target Number and one applicable rating, including results exactly at the target.
Calculate 3d8 oddsTHE RULES FOUNDATION · FREE REFERENCE
Integrity Engine Tools & Rules
Integrity Engine is an adaptable tabletop roleplaying system for consequential stories. Its core uses three eight-sided dice, four Pillars, positional States and Pressure. Integrity Forge provides free reference utilities while a separate Game Architect authoring tool is being developed.
Warriors Tools
Create biblical names and fictional opposition for historically grounded storytelling.
Explore WarriorsLegacy Tools
Build near-future identities, aliases, factions and Scripture-centered character reflection.
Explore LegacyWhat makes Integrity Engine distinct?
Resolution uses 3d8 plus one applicable rating against a Target Number. Adding three dice makes middle results more common than extremes, so each modifier matters. Exactly meeting a target is a success at cost, also called an Endured Success; the calculator distinguishes equality from exceeding the target.
Four Pillars, one flexible foundation
Heart
Relationships, compassion and human connection.
Soul
Conviction, belief and meaning.
Mind
Awareness, knowledge and judgment.
Strength
Exertion, endurance and action.
Games can use Pillars alone or add Skills to represent more specific methods. The four-Pillar foundation and 3d8 resolution provide consistency across different fictional worlds.
States, Conditions and lasting consequences
Exposure, Stability and Mobility are three positional State axes used during Trials. Conditions describe continuing effects. Pressure and Lasting Harm reflect strain associated with each Pillar. These concepts are different from setting-specific resource dials.
Build your own world with Integrity Engine
Forge's separately licensed Game Architect is in development for Witnesses who wish to configure supported rules and original worlds. It is not for sale or publicly accessible through this reference page. Ownership of an Integrity Engine book alone will not automatically grant the eventual add-on.
Start with a useful free tool
Explore the odds of your next Trial or prepare a story with Forge's free generators.
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