Bright-Dark 3d6 Role-Playing Game - Core Mechanics

Bright‑Dark uses a simple 3d6 roll‑over system designed for clarity, fairness, and emotional pacing. This section explains how rolls work, how modifiers apply, when to roll, and why the system supports the tone of the game.

CORE MECHANICS

3D6 + MODIFIERS, ROLL OVER

Roll three six-sided dice, add one modifier from an attribute, and add one modifier from a talent (3d6 + attribute + talent). Meet or exceed a difficulty (described as a target number or TN). Most 3d6 rolls fall between 9-12, so small bonuses matter.

Combining Modifiers

Talents are separate from attributes. Some talents add a modifier to 3d6 rolls. A 3d6 roll can only benefit from one attribute and one talent at a time.

3d6 + attribute + talent bonus

Multiple talents never stack with the same roll. Use the attribute and talent that best fits the fiction.

DIFFICULTY SCALE

Difficulty of actions should feel intuitive and meets your expectation of a difficulty in a believable world. Refer to the scale below of Difficulty Target Numbers (or Difficulty TNs). If an action can reasonably succeed, no roll needed. Call for rolls when the outcome is uncertain and the consequences are dangerous or dramatically meaningful.

TN 6 Trivial (95% success)

TN 7 Trivial (91%)

TN 8 Very Easy (84%)

TN 9 Easy (74%)

TN 10 Standard  (62%)

TN 11 Standard (50%)

TN 12 Hard (37%)

TN 13 Very Hard (26%)

TN 14 Heroic (16%)

TN 15 Very Heroic (9%)

TN 16 Legendary (5%)

SITUATIONAL MODIFIERS

In some games, players get bonuses or penalties by making changes to the situation such as using a proper tool or getting help from an ally. These bonuses or penalties are called situational modifiers. They can be complex. This is messy for Bright-Dark.

In Bright-Dark, the GM may adjust the Difficulty TN of a roll by no more than ±1 to reflect the situation. No stacking. This does not represent a change in objective difficulty; it is simply a way to keep the math simple and the fiction clear.

Examples: Half-cover, defending, dual-wielding, subduing attacks, long range, called shots, surrounded or flanking, Darkness, obscuring features, hidden opponents, being grappled or prone, stormy weather, treacherous ground, tight spaces, physical conditions such as exhaustion, injury, sickness, shaken, or poison, broken or bad equipment, magic conditions, curses, blessings.

CONDITIONS & STATUS EFFECTS

Most conditions familiar to Fantasy TTRPGs are mechanical. In Bright-Dark, the statuses exist in the fiction, not the rules. They are left undefined so that the GM may adjudicate them as situational modifiers (see above mechanic) or story developments. Not all poisons or venoms need to be the same. Some reduce current health, some temporarily reduce attributes (reference the Modifier Table in the Attributes section). Some might reduce your movement speed to slow.

BRIGHT-DARK FANTASY GENRE-SPECIFIC MECHANICS

A bright-dark fantasy world’s tone (not morality) can be reinforced by these mechanics: Light Bonus and Darkness Penalty. Use them sparingly, yet meaningfully. A good rule of thumb is never for routine actions and always for emotionally charged choices.

Light Bonus

When acting with hope, courage, or protecting others, roll 4d6, keep the highest three.

Examples: Believing in hope in a dim situation, acting with courage despite fear, showing kindness that costs something, shielding others from harm, and actions that reinforce hope.

Darkness Penalty

When acting in despair, corruption, or darkness, roll 4d6, keep the lowest three.

Examples: Despair when a character has given up, even temporarily, corruption when the character taps into a harmful force or gives into temptation, displays malice or cruelty, when fear overwhelms judgment, or moments that make things worse emotionally.

FRACTIONS

If any fractions occur, always round in the player's favor. No exceptions. This is fast, intuitive, and generous.

FAILING FORWARD AT A COST

Typically, success and failure is pass or fail; however, if a player's roll is within 1 of the TN, a GM can use their discretion to allow characters to fail forward at a cost. The cost should suit the fiction. Consider player input for this.

This rule is about pacing rather than releasing tension because it avoids the game from stalling due to bad rolls. Good pacing is good for tension.

REACTION ROLLS

Reaction rolls determine the starting attitude of newly met NPCs. The GM rolls 3d6 + the Emotion modifier of the lead or nearest PC. Use the result to establish the NPC’s initial disposition.

Reaction Table

3d6 + Emotion modifier of the lead or nearest PC. Use this table as a guide. When in doubt, feel the dice.

Below is a Reaction Roll table showing five degrees of results. The GM should interpret the meaning of the result within the fiction. For example, Worst Case does not mean the NPC is automatically violent, the reaction is the worst reaction for that situation.

• TN 8 or Less: Worst Case
• 9-11: Unfavorable
• 12: Neutral
• 13-14: Favorable
• 15+: Best Case

Reaction rolls set the initial tone, not the entire relationship. Treat the result as an emotional cue, not a script. NPCs can warm up or cool down based on the PCs’ behavior.

MORALE CHECKS

Thinking, feeling creatures have a sense of self-preservation. They don't just fight to the death unless the fiction demands it.

When opponents have been reduced to half their collective Health or half their number, the GM makes a Morale Check.

Roll 3d6 vs the creature's Morale TN.

• If the result meets or beats the Morale TN: They keep morale and continue to fight.
• If the roll is below the Morale TN: They lose morale and may flee, surrender, hide, or attempt to parley.

Creatures who are brave have lower Morale TNs. Creatures who are cowardly have higher Morale TNs. Average creatures have a Morale TN of 10 or 11. 8 is brave, 13 is cowardly. Mindless creatures do not make morale checks.

Morale checks reflect fear, instinct, exhaustion, and the emotional reality of combat.

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Bright-Dark 3d6 Role-Playing Game - How to Play

Bright‑Dark is played through conversation. This section teaches the core loop of play, how players describe actions, how the GM frames scenes, and how everyone collaborates to create a shared emotional experience. If you’re new to fiction‑first role‑playing, start here.

 

HOW TO PLAY

GAMEPLAY LOOP

Conversation is the medium of the game. The game has a simple gameplay loop:

• First, the GM describes the scene.
• Second, the players describe what their characters say and do, and how.
• Third, the GM determines what happens and describes it.
• Repeat until the scene is resolved, then establish a new scene.

It looks like this:

Fiction → Action → Resolution → New Fiction

Resolution may come from the GM’s judgment, from the logic of the fiction, or from a roll when the outcome is uncertain and meaningful.

WHAT PLAYERS DO

Don't just declare your actions, describe them. Describe what your character does, and how they do it. The intended outcome of your action should be clear to avoid confusion or misunderstanding. For example, don't say "I search the messy drawer", say "I carefully, thoroughly sift through the drawer, checking under and between everything. I empty it one item at a time and arrange them neatly on top of the desk."

Imagine your description is like writing a line in a book. Clear, concrete descriptions let the GM understand your intent and respond fairly.

If your character speaks, you may speak in-character, with or without a different voice or accent, or you may paraphrase what they say.

WHAT THE GAME MASTER (GM) DOES

GMs are like the narrator in a book, the kind where the narrator talks to the characters in the story but doesn't give anything away. You may ask the players what their characters are doing, or you may gently coax them into taking actions or revealing what their characters are feeling.

Think of yourself as controlling the camera: you choose what the players see first, and when to zoom in. You are responsible for showing the players what's in the scene. Use descriptions of what the players see, hear, smell, taste, and feel. Think about the mood, and start with the big things.

Example:

"The old library is quiet and cold. The air is oddly still. A soft light spills in from behind, revealing a few rows of dusty bookshelves. The shelves end only a few meters ahead, but far beyond them you catch a faint glint in the darkness, suggesting the room is much larger than it first appears."

The dimensions and features of the library, do not need to be literal and precise. You can and should rely on the players imagination to fill gaps. Again, start with big. If a player wants to pick a smaller part of the room to focus on, that is when you zoom in.

In running the game, it's important that you be fair, impartial, and consistent. That means allowing the characters to succeed or fail based on their choices. Don't help them when they're in danger or struggling to solve a challenge, but also, don't trick them or create impossible situations.

When portraying the non-player character(s) (NPC), that is your character. You portray them. You decide what they know, think, feel, and what they do and how. You don't need to be an excellent actor. You may rely on describing how the NPC expresses themself and how they sound, such as if they're clearly angry, or if they're clearly surprising their frustration.

FICTION-FIRST PLAY

Many video games prepare players to think about the game's rules and mechanics. Game mechanics and rules are intended to simulate something that the video game can't do and are a work-around for a limitation of the medium of the game.

This is a game about conversation. A human mind, or a table full of human minds, do not have as many limitations as a video game. There are things we can figure out using our own judgment.

When a player describes an action, do not consult the rules to see if it is permitted. Instead, judge the action by how the world works, not by what the rules allow. Then, decide how to resolve it. Base the difficulty of the action on how likely it would be for an ordinary person to succeed at it in real life. Don't choose an arbitrary difficulty or a difficulty with the intent of making a more challenging scene. Be consistent. If a similar action succeeded earlier, it should succeed again under similar circumstances.

This rules exist to support the fiction, not to constrain it.

When to Roll vs When Not to Roll

In following with a fiction-first style of play, we rely on the logic of the fiction to guide us. If an ordinary person could do it reliably, the character succeeds without rolling. If an action is truly impossible, no roll can make it succeed. The dice don’t override the logic of the world.

Dice are a tool for the GM to use to resolve situations where a judgment alone won't do. When an outcome is uncertain, a roll may be needed when there are meaningful consequences for failure, if there is danger, or if the action is being actively contested. Roll only when failure would matters; when it could change the situation, introduce danger, or complicate the story.

Don't call for a roll if nothing happens on a failure. Establish a consequence. Loss of time, danger approaches, etc.

Player-Skill Forward

This game relies on the players’ skill, judgment, and creativity rather than on character powers or mechanical bonuses. Players should rely on their own intelligence, wisdom, charisma, luck, and creativity.

We don’t roll to perceive things in a room; we discover what’s there by describing how we explore it. We don’t roll to influence others with speech; we persuade NPCs by making clear arguments, offering what they need, and responding to their objections. We don’t roll to solve obstacles; obstacles are problems for the players to solve using their own wits and creativity.

Player-skill-forward play keeps the game grounded and immersive. It encourages players to think like their characters and engage directly with the fiction instead of relying on mechanics to do the thinking for them.

GM PRINCIPLES

• Test empathy, not power
• Play to find out what happens
• Prepare the world, not the story or the outcome
• Challenge the characters, not the players
• Present danger honestly and clearly
• Stay neutral
• Let consequences follow
• The world is neither hostile nor friendly until the players act
• NPCs have motives, not alignments
• Use rolls only when needed
• Reward player creativity
• Respect player agency
• Roll dice openly
• Protect immersion; guide a distracted table back the fiction

PLAYER PRINCIPLES

• Characters must suit the tone and the setting
• Treat characters like people, not obstacles
• Act through the fiction, not the character sheet
• Be proactive. Seek goals
• Make your intent clear
• Embrace consequences
• Collaborate, don’t compete
• Solve problems with your wits, not your stats
• Stay curious
• Explore, investigate, and engage with the world the GM presents
• Don't exploit weaknesses in the mechanics or rules
• Put your phones away
• No pausing the movie to talk about the movie. Stay in the moment; save the meta for later

MATERIALS

Pencil, paper, and six-sided dice. Optional: miniatures (minis), a 6" grid, tokens to represent light, hope, or other narrative resources.

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Bright-Dark 3d6 Role-Playing Game - Read This First! — Intro

Bright-Dark is not a genre or a trope list. It’s a tone, a wounded, hopeful emotional space where light and darkness coexist. This section explains the heart of the game: why the world feels the way it does, why characters matter, and what makes Bright-Dark different from heroic fantasy or grimdark storytelling.

READ THIS FIRST!

WHAT IS BRIGHT-DARK ABOUT?

This section is foundational to this game; The heart, soul, mind, and spine. Bright-Dark is not a genre, theme, or a trope list. It's a tone, a mood, a vibe; and a very specific one! That makes this a very difficult concept to communicate.

It describes a world that is wounded and hurting but not doomed, dying, or coming to an end. Darkness presses on us. Light is precious. Wonders still exist but are fragile and fading. People carry quiet grief but endure with small warmth and kindness. Characters face real danger yet respond with quiet courage. Hope is fragile and sustained by human connection. Beauty comes from vulnerability, not perfection. Endings are bittersweet, not tragic or triumphant. It’s melancholy without nihilism. Heroes are ordinary people distinguished by hope, courage, and kindness, and villains are the ones whose core wound has cost them these things.

Bright-Dark is not bright against dark, it's bright within dark. It's not a contrast, it's a fusion. It's the coexistence of two emotional states living side-by-side in the same moment. Light doesn't triumph. Darkness doesn't vanish. Darkness makes courage, kindness, and hope meaningful because they're needed. Though darkness can be personified as a villain or a monster; darkness is the burden, the wound, or the quiet struggle that presses on us till we bend or break. Wonders are scarce and fading because the world is wounded, but they show that the world is still alive and that there's something worth saving.

Stakes are small in scope but large in meaning. They are personal, intimate, and emotional. Save a lonely village, protect a forgotten shrine, heal a dying grove, break your family's curse, soothe a restless spirit. The stakes matter because they matter deeply to the people and places, not because they matter to nations, gods, or the universe. Threats don't escalate globally or cosmically, they escalate personally. A Bright-Dark hero is not a chosen-one, they're just someone trying. You can go on long journeys with constant threats, and as long as the emotional framing stays human in scale, this is Bright-Dark. Something is saved, something is lost, something is learned, something is carried forward.

Darkness can never truly be overcome, but we never allow despair to have the last word.

This tone shapes the world, the characters, the monsters, and the choices you'll make in play.

Table: Tone Guide

Tone Element	Too Weak	Just Right	Too Strong
Light	Bright, clear, colorful	Soft, dim, muted	Oppressively dark, hard to see
Emotion	Detached, sarcastic	Warm, sincere	Overly sentimental
Courage	Bravado, swagger	Quiet bravery	Self-sacrifice every scene
Wonder	Commonplace magic	Fragile, rare magic	Overwhelming spectacle
Darkness	Cartoonish villains	Gentle, eerie threats	Horror, gore, cruelty
Stakes	Trivial, gamey	Human, personal	World-ending, epic
Mood	Cheerful, upbeat	Melancholy-hopeful	Hopeless, bleak

Examples of Bright-Dark Tone

Think about Star Wars V: The Empire Strikes Back, Spider-Man 2 (2004), Samurai Jack, Princess Mononoke, The Iron Giant, Book 2 of Avatar: The Last Airbender, Harry Potter and the Prisoner of Azkaban, or The Lord of the Rings (Peter Jackson trilogy).

Bright-Dark Fantasy

Bright-Dark fantasy is just a Bright-Dark tone applied to a world where magic, myth, and the supernatural exist. Fantasy elements don’t make the world brighter or darker. Bright-Dark can appear in any genre. This particular game focuses on Bright-Dark fantasy.

Why Tone Matters

Bright-Dark RPG is not about how to tell stories, it’s about how stories should feel. Tone is the emotional temperature of the game, and it’s the hardest part of play to communicate. No rulebook says it out loud.

Traditional RPGs have a lot of unwritten, unspoken expectations. Everyone assumes they’re playing the same game, but they’re not. It’s like being invited to dinner without knowing what will be served, then discovering that every dish uses incompatible ingredients. The meal might still be good, but it will never be the right meal, and no one knows what the host intended.

To extend the metaphor, each guest brings a side dish based on their own assumptions. Some dishes are better than others, but they don’t fit together. The result is a hodgepodge meal that everyone politely accepts, even though it isn’t coherent.

Tone is the invisible ingredient that makes the meal work. When everyone understands the tone, the dishes complement each other. The story feels unified. The emotions land. The game becomes what it was meant to be.

Bright-Dark teaches tone directly so players and GMs can create the same emotional experience together, not a hodgepodge, but a shared mood.

What This Game is About

Treasure is not the goal. Darkness can never truly be vanquished. Fate has no chosen saviors on a carefully laid path.

You are trying to make things a little better, but not through grand heroics. The heroes of bright-dark are often ordinary people distinguished through acts of quiet courage, small yet meaningful kindness, and by staying hopeful especially when it's hard.

Quiet courage is not bold like a champion announcing his presence, it's subtle like being the only one in the room to stand up for a simple truth. It's taking another step into a dark forest when your instincts tell you to run.

Everyone has a burden. Kindness reminds them to keep trying. Even small kindness can form bonds and encourage trust. Greater acts of kindness call on people to make scarifies. Those who offer such kindness do so because they understand what it means to hurt.

Optimism is confidence in a good outcome. Hope isn't. Hope is a frail. When you choose hope over giving up, you are often making a hard choice others would think is wasted effort. What matters is choosing hope over abandoning it.

You carry an emotional wound in a world that is similarly wounded. A light nearby is dimming, a forest is dying, or a curse is spreading. Go towards it. Face it. Try to understand it. You may redeem it, heal it, survive it, or temporarily vanquish it. You may succeed at a cost or fail with a silver lining. Either way, your choices leave the world a little brighter than before.

What This Game is Not

Bright-Dark is about an emotional tone with nuance, restraint, subtlety, and emotional literacy. This is not heroic fantasy, grimdark, gloomy but safe, spooky mystery, a tactical dungeon-crawl, a power fantasy, moralistic, epic, or vanquishing evil for good. Bright-Dark has no world-saving plots, cosmic evils, chosen-one narratives, miraculous powers, superpowers, massive armies, political intrigue, or power arcs. 

Unlearn everything you know about genre tropes, expectations, assumptions, and habits.

Tones and Themes

These themes and tones of Bright-Dark are meant to be evocative of a specific emotional flavor, texture, or vibe and distinguish Bright-Dark from other tones. Imagine a gentle darkness. This is distinct from a spooky or vile darkness. Its darkness that means you no harm but still carries danger. When darkness appears as an adversary, it isn't monstrous; it's wounded, quiet, and pressing in.

Core Tones

Melancholic but Warm

Quiet Courage

Small Kindness

Fragile Hope

Human Stakes

Bittersweet Beauty

Gentle Darkness

Wounded Wonder

Core Themes

Kindness

Burden

Connection

Sacrifice

Healing

Small Victories

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