3d8 Bell Curve
Results reflect competence, not random swings.
Integrity Engine
Who do you become when the pressure builds?
A unified roleplaying engine where physical, social, mental, and spiritual challenges share one core language — and your choices determine where the strain lands.
What Makes Integrity Engine Different
A single engine for every kind of challenge.
Physical, social, mental, and spiritual conflicts use the same clear, consistent framework — built around the whole person and meaningful consequences.
One Trial Framework
Any kind of challenge uses the same core resolution system.
Four Pillars
Heart, Soul, Mind, and Strength matter mechanically.
Pressure & Harm
Challenges leave a mark and shape future decisions.
Four Actions
Attempt, Move, Aid, and React keep play focused and fluid.
Tactical Depth
Edge, positioning, Conditions, and Disciplines create meaningful choices.
One Engine for the Whole Person
Four Pillars. Real People.
Your character is more than a skill list. The four Pillars shape how you face challenges, bear pressure, and grow.
Heart
Courage, relationship, mercy, leadership.
Soul
Conviction, conscience, faith, spiritual endurance.
Character Under Pressure
What you stand for can change what happens next.
Integrity Engine™ does not reduce character to attributes. Convictions define what matters, Edge captures a concrete advantage, Integrity gives costly commitment mechanical weight, and Impact lets standout moments change more than a single result.
Convictions
Define the line that matters.
Write the standards your character means to live by. They become most interesting when honoring them costs something.
Edge
Make advantage matter.
Pressure Changes What You Do
Every mark matters.
When Pressure builds, it affects your choices. Adapt, change your approach, and draw on different Pillars to overcome the challenge.
Strength
Pressure4/5
Lasting Harm3/5
When Pressure fills, the cost of continuing in the same way grows — so you adapt, seek help, or change your approach.
One Trial Framework
The challenge changes.The language stays familiar.
A Trial can be social, spiritual, mental, or physical. The fiction decides what kind of pressure is in play; the shared framework keeps the table from learning a different subsystem every time the story changes.
Heart
Social
Trust, leadership, mercy, loyalty, intimidation, and relationship.
Soul
Spiritual
Conviction, conscience, temptation, faithfulness, and spiritual endurance.
Simple Core. Tactical Depth.
Four actions drive the game.
A clear action economy keeps the focus on meaningful choices, while Edge, positioning, Conditions, and Disciplines give you room to be creative.
Attempt
Take the action.
Move
Reposition and take a Posture.
Aid
Help an ally.
Disciplines
Capability should feel like it belongs to the character.
Disciplines are named, fiction-bound capabilities shaped by training, equipment, preparation, relationships, devotion, and practiced responsibility. They make characters distinct without asking every specialty to become its own subsystem.
Training & Practice
What the character has learned to do reliably through experience and repetition.
Tools & Preparation
Equipment, planning, and methods that open options when the fiction supports them.
Identity & Relationship
Responsibilities, bonds, devotion, and lived commitments that shape how a character acts.
The Roll
3d8 Bell Curve
Common results cluster near the middle. Competence feels reliable, modifiers matter, and exceptional outcomes stay exceptional.
- A d20 gives every result the same 5% chance, which makes outcomes flatter and swingier.
- 3d8 results cluster near the center.
- Extremes are rare, but possible.
- Preparation and modifiers stay meaningful.
One Engine. Many Worlds.
From ancient covenant to a broken future.
The same core framework supports very different settings because the rules describe pressure and response rather than prescribing one genre.
Help Shape the Engine
Put Integrity Engine under pressure.
Integrity Engine is actively being playtested. Bring it to your table, run the included prewritten scenario, and help us see what holds up when the choices get difficult.
Start with the Quick Start Guide
Everything you need for a first session.
The Discord playtest hub includes the Integrity Engine Quick Start Guide and the prewritten scenario featured in this artwork, so your group can learn the core rules in play instead of reading the full rulebook first.
Quick Start Guide
Get Started
Rules, Tools, and Resources
Everything you need to learn the system, build a character, and start playing.
Integrity Engine FAQ
The details most people want after they understand the core idea.
The Question Under the Rules
Who do you become when the pressure builds?
Start with the rules, build a character, or step into one of the worlds already powered by Integrity Engine.
