[Space] GURPS Handbook of the Planets

[Celti]

Originally Posted by Brett

No, I can't say that I have. Nor am I qualified to write one.

The discussion in this thread seems to indicate that you're better-qualified than some, but I'll let that rest.

Originally Posted by Brett

Besides, the existing world-building sequence is 72 pages.

That, I completely didn't think about. Bit long for Pyramid, yeah. Oh well.