SWURPG – Star Wars Universe Roleplaying Game

Dice System & Difficulty Class

In SWURPG, most challenges — from slicing into a databank to dodging a Sith’s Force strike — are resolved with one iconic tool: the 20-sided die (d20).

Whenever success is uncertain, you roll a d20, add your bonuses, and compare the result to a target number called the Difficulty Class (DC).

Making a Check

To attempt an action that requires a roll:

🎲 Roll 1d20
➕ Add your Ability Modifier
✅ Add your Proficiency Bonus (if proficient)
🛠️ Add situational modifiers (gear, Force powers, traits)
📏 Compare the total to the DC

If your total equals or exceeds the DC, you succeed. If it falls short, the action fails — or the GM may allow partial results with consequences.

Setting the Difficulty

The GM sets the Difficulty Class (DC) based on the challenge. Here’s a general guideline:

🟢 Very Easy: DC 5
🟢 Easy: DC 10
🟡 Moderate: DC 15
🟠 Hard: DC 20
🔴 Very Hard: DC 25
🚫 Nearly Impossible: DC 30+

Environmental conditions, gear, and teamwork can shift the DC higher or lower.

Natural 20s & Natural 1s

🌟 Natural 20 (Critical Success): Always a hit on attacks. Strong success on checks/saves at GM discretion.
💥 Natural 1 (Critical Failure): Always a miss on attacks. Severe failure on checks/saves at GM discretion.

These rolls bring drama and cinematic moments to every encounter — use them to elevate the storytelling!

Advantage & Disadvantage

In SWURPG, the rules for Advantage and Disadvantage follow the streamlined mechanics of D&D 2024 (and 5E), adapted for the Star Wars setting. Here's a reminder:

🎲 Advantage and Disadvantage

Advantage: Roll two d20s and use the higher result.
Disadvantage: Roll two d20s and use the lower result.

🧠 When Do You Have Advantage?

You are hidden or in cover while making an attack.
You have high ground or tactical positioning.
You use a class feature, feat, or Force power that grants advantage.
A teammate assists you (via the Help action or similar).

💥 When Do You Have Disadvantage?

You are blinded, restrained, or prone while attacking.
You're targeting a creature in full cover or obscured by darkness or smoke.
You’re using a weapon you’re not proficient with.
Environmental factors like strong wind or zero gravity interfere with your action.

⚖️ Stacking Rules

Multiple sources of advantage or disadvantage do not stack.
If you have both advantage and disadvantage on a roll, they cancel out and you roll a normal d20.
Two sources of advantage and one of disadvantage still cancel to a normal roll.