Welcome to the world of Octas.

Companion to the Octas D77 TTRPG system, is the world of Octas (no italics), a fantasy-wrapped hard(ish) sci-fi environment in which the game may, optionally, be played.

By fantasy-wrapped sci-fi, I mean that the game plays as fantasy but if you dig deeply enough you will notice the magic, creatures, etc. have a basis in a consistent and explainable set of physical systems (these systems are not guaranteed to be realistic, but they are supposed to be self-consistent). It is all explicitly designed that the sci-fi element can be safely ignored: this aspect is just about providing world-consistency, and won't ever impact actual game-play, to the point that even the GM can ignore it except if creating new creatures or magics that are intended to properly fit the Octas world.

The Octas world is not a catch-all for all (or even most) fantasy genre possibilities and is only a very specific instance of one. It was constructed explicitly to be a bit more removed from the more traditional human mythologies of Earth, both ancient and modern, which tend to provide the bulk of the 'feeder stock' for many fantasy worlds.

Not that there is anything wrong with doing it that way, I just didn't feel like re-hashing something that others have already done well.

Note that you will still find outwardly-familiar fantasy elements in the Octas world. However they will often have been warped a bit to fit the underlying sci-fi world-building model. Octas Dragons, for example, are long-necked bat-like monotreme mammals, but are more than Dragon enough to earn the title.

A few useful notes on the world of Octas:

Follows are things anyone living on Octas would reasonably know about their world:

Plus, for players' convenience, a few additional comparisons to Earth:

(No-one living on Octas today is aware of the existence of Earth, or anything to do with it!)

Also, the 'Orange' is an astronomical term derived from the peak light frequency in a wide band, the star is not noticeably more orange in colour than the Earth's sun (which actually peaks in 'green', not yellow anyway). In terms of human perception, the difference between a 'red' star and a 'blue' star is analogous to the difference between a 'warm-white' and 'cool-white' light-bulb, so while there is a noticeable difference across the whole range, it is very subtle relative to the human-visible colour spectrum.

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