Stars Without Number
Revised EditionSandbox sci-fi with the best GM tools in the business
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Best For
Sandbox sci-fi campaigns with comprehensive GM tools for faction turns, sector generation, and adventure creation.
Core Mechanic
2d6 + skill + attribute ≥ target for skills; d20 + modifiers for combat. OSR-inspired.
ComplexityHow much there is to learn
Medium
Resolution splits cleanly: 2d6 plus skill and attribute for tasks, d20 versus AC for combat. Character building carries the interest, layering backgrounds, classes, and foci, with psionics run on a pool of Effort. The systems stay readable around a few shared modifiers.
AvailabilityHow you get the rules
- Free to tryFull core rulesLegally free as an SRD, PDF, or official web rules
- Get it nowAvailable nowFree to download or read online
RunnabilityWhat the book gives you to run it
- ✓IndexFind any rule by page number
- ✓GM guidanceA chapter on how to run the game
- ✓Examples of playRules shown in action at the table
- ✓Quick referenceCheat sheet or summary tables
- ✓Cross-referencesRules point to each other by page
5 of 5 book tools found in the core book
Highlights
Free version is generous, comprehensive sandbox tools, faction system
Considerations
OSR combat can feel flat compared to modern tactical systems, B/X heritage means limited mechanical support for social or narrative play
Rules license Proprietary
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