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The GM's Planet-Building Handbook

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Draken Games

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$3.95

So, your sci-fi RPG campaign is going to span vast volumes of space and introduce new alien races from an exotic medley of planets. But just what are those planets like? This handbook will allow you to design realistic planets capable of bearing human (or human-like) life. Guidance is given on:

Host star
Planet orbit
Planet size
Axial tilt
Moons
Planet rotation
Magnetosphere
Geological activity
Atmosphere
Hydrosphere
Climate

Plus, there's a section on how to produce accurate maps of your planet.

The handbook is based on scientific principles, but don't worry, all the numbers have been crunched and distilled to a few easy-to-use charts and tables.

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Critiques (5)

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Chris K.

September 4th, 2019

An amazing resource for planet building incredibly detailed and informative a great resource for any space adventure [...]

Sensible C.

July 9th, 2019

I grew up on "World Builder's Handbook" and "Dungeon Builder's Handbook" by Wizards of the Coast and they served their purpose well, but for less than five dollars, this little beauty handles planet creation a little bit better than [...]

Kevin W.

June 3rd, 2016

I wish I had put something this nice and concise together. Worth it if you love to put a little real-science feel in your SF games. [...]

Christopher H. [Featured Reviewer]

June 13th, 2012

If you’re running a sci-fi RPG that involves interplanetary travel and you, like me, don’t know all that much about the details of planetary physics, then you owe this resource to yourself and your players. You’ll need to track along with some sc [...]

D. D.

March 31st, 2012

Excellent book, it is short and to the point ! This is not a set of tables to randomly generate worlds, we have this in many sf games anyways. This guide explains you how do planet "work", what is the physic and the logic in their features, [...]