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The Planet Builder

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The Planet Builder

Build scientifically viable star systems, planets, belts, trojans, lifeforms and civilizations. Designed for use for the Starfinder Roleplaying Game, though usable for many sci-fi game systems lacking rules to create full star systems. A series of randomly rolled tables to create stars and celestial bodies, a planet point system allowing you tweak the results of your rolls, purchase artificial megastructures to advance the capability of your defined system setting.

Star Systems Tables:

  • Stars: # of stars, color/type, system age, stellar hierarchy, # of planets
  • Planets: order of planets, class, tidal locks, spin resonance, cores, belts, trojans
  • Atmosphere: wind frequency/strength, Hydrosphere precipitation frequency/strength
  • Lifeforms - types, compatibility, intelligent life
  • If Intelligent - technology, government, magical abundance
  • Trade Resources - botanicals, fuels, valuable minerals
  • Planet Point System - adjust Tier of systems, purchase megastructures
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Product Information
Rule System(s)
Publisher Stock #
GPS 1058
File Size:
6.4 MB
Original electronic
Scanned image
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File Information
Watermarked PDF
Watermarked PDF

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File Last Updated:
November 23, 2021
This title was added to our catalog on November 23, 2021.