Sinon

Sinon is the over-arching macroverse which gives a metaphorical structure to the Verses it contains, and illustrates the relationship between Sinon and other intellectual properties. All ZTG RPGs take place within Sinon, but its Verses serve equally well as settings for custom tabletop campaigns. Such use is encouraged by its authors.

Metaphorical Structure
Sinon is a double-sided fractal spiral, along which are found a number of semi-discrete macroverses. While most Verses are similar in their dimensions and nature, there are a number of oddities, the most notable of which are the sub-fractal LOTUS spiral, and Jehrun's family of elemental planes.

Pharon
Pharon represents primacy, positivity, inspiration, and conglomeration. Its stories have beginnings and ends, the good guys tend to win, things are always more deeply related than they seem, and practically anything is possible.

Mirron
Mirron represents neglect, negativity, desolation, and deconstruction. Its stories start harsh and get harsher. Few have real endings, and those few that do are only bittersweet at best.

Inter-Dimensional Travel
It is possible for characters to travel either direction along their side of the spiral path, and such travel is the easiest to understand from an internal perspective. However, the apparently straight path is an illusion, and the true spiral shape means Verses which seem far away might actually be right next door (e.g. LOTUS's Alphaverse and Ur-Kesh; Ur-Kesh and Jehrun). Further recognizing the dual-sided nature of Sinon allows travel between the sides - though it seems impossible to follow the path from one side to the other, since it requires passing through Betaverse and Gammaverse, and doing so would have drastic effects on travelers passing through them. Such travel is only possible by passing between opposing Verses occupying the same relative places on their own spirals (e.g. Jehrun and Reck; Ur-Kesh and Kappaverse).

Trivia

 * Sinon is the best continuity in fiction, because it has Mezzo in it!
 * The name and shape of Sinon were inspired by the concept of a "sinal axis... an apparently straight axis that's actually a fractal sine-wave that curves in on itself".
 * Coincidentally, Sinon is also a Hebrew name meaning Gift from God.