R0-11 is a free online dice roller and probability calculator built for the Star Wars Roleplaying Game by Fantasy Flight Games and Edge Studio. It supports Edge of the Empire, Age of Rebellion, and Force and Destiny.

Roll the full set of narrative dice — Boost, Setback, Ability, Difficulty, Proficiency, and Challenge — and instantly see results broken down by Success, Failure, Advantage, Threat, Triumph, and Despair. R0-11 also supports standard numeric dice (d4, d6, d8, d10, d12, d20, and d100/percentile).

Key features include Monte Carlo probability analysis to estimate the odds of any dice pool, a roll history log for your game sessions, shareable roll results, multiple movie-era dice themes spanning all nine saga films, Aurebesh numeral support, and full offline access as an installable progressive web app.

The Star Wars RPG uses a unique narrative dice system where outcomes are more nuanced than simple pass/fail. Each roll can produce multiple types of results simultaneously:

• Success & Failure determine whether you accomplish your goal. Successes cancel out Failures — the net result decides the outcome.
• Advantage & Threat represent side effects. You might succeed but trigger a complication (Threat), or fail but discover something useful (Advantage).
• Triumph & Despair are rare, powerful results that can dramatically shift the narrative — a critical breakthrough or a catastrophic setback.

Players build a dice pool from their character's abilities and the difficulty of the task. Positive dice (Boost, Ability, Proficiency) represent skill and luck, while negative dice (Setback, Difficulty, Challenge) represent obstacles and opposition. R0-11 handles all the symbol counting and cancellation automatically.

In the year 24 ABY, during the early days of the New Republic, the renowned droid manufacturer Industrial Automaton unveiled a specialized variant of their R0-series astromech line. This unique prototype, designated R0-11, was not built for starship repair or hyperspace navigation like its siblings, but for something far more complex: multi-dimensional probability analysis.

Originally commissioned by the New Republic Military Academy on Chandrila, R0-11 was designed to help tactical instructors teach cadets the intricacies of battlefield probability assessment. The Academy's instructors had grown frustrated trying to explain the complex interplay of success and failure, advantage and threat that defined real combat scenarios—outcomes that couldn't be captured by simple binary calculations.

Industrial Automaton's engineers, drawing on their decades of experience with R-series astromech design, equipped R0-11 with advanced probability computation modules capable of processing what they termed "narrative probability matrices"—complex algorithms that could account not just for success and failure, but for the nuanced outcomes that skilled tacticians knew could emerge from any situation.

After the Academy's closure during the political upheavals following the Yuuzhan Vong War, R0-11 found new purpose serving Resistance cells and independent academies throughout the galaxy.

Today, R0-11 continues its mission of probability education, helping beings across the galaxy understand that in real conflict, victory and defeat are rarely simple binary outcomes. Sometimes you succeed despite complications, sometimes you fail but gain valuable intelligence, and sometimes—just sometimes—extraordinary triumph or devastating despair can change everything.

Manufacturer: Industrial Automaton

Product Line: R0-series Astromech (Specialized Variant)

Primary Function: Probability Analysis & Tactical Assessment

Specialization: Multi-dimensional outcome calculation

Core Systems:

• Pattern Recognition Matrix: Analyzes complex symbol combinations for Success/Failure outcomes
• Advantage/Threat Computation Engine: Processes secondary effects and unintended consequences
• Triumph/Despair Analysis Module: Specialized rare event probability calculator
• Narrative Probability Synthesizer: Integrates multiple outcome variables into coherent probability assessments

Unique Capability: R0-11 can simultaneously process dice results across six different outcome categories (Success, Failure, Advantage, Threat, Triumph, Despair) while maintaining real-time probability calculations for all possible combinations.

We are a just small band of independent creators making software for the hobbies that we love.

We'd love to hear from you. Got feedback on R0-11 like bugs or ideas for new features? Ideas for other tools or games? Say "Hello There"!

v0.9.0 · Built Apr 9, 2026, 03:22 AM