GURPS Space Fourth Edition (GURPS: Generic Universal Role Playing System)

The Future Is Yours!

Now updated for GURPS Fourth Edition, this is the ultimate toolkit for any campaign between the stars.
Explore options for space travel and technology, from the realistic to the miraculous. Design alien races and monsters.
Create campaigns of every style, from science fantasy to space opera to star merchants. Build worlds, from asteroids to Dyson spheres.
With this book, you can create anything from a single alien beast to a whole galaxy of civilizations and star systems... quickly and randomly, or with a detailed step-by-step process that's true to biology and astrophysics as we understand them today.