Xd13 games to run in the same continuity

See previous. Presumably you'd want some kind of secret council chamber where the poor GMs of all of these coordinate everything, but the good news is they hardly have to come up with anything at all. I’ve suggested specialized systems for specialized purposes, but you could just as easily go with a single system that scales well, no system at all, etc.

1. The gods. Run using some sort of GMless narrative system. The referee team's only privilege is that they get to actually see what the gods are doing (or that there is a god game going on) and interpret the consequences for everywhere else. 
2. The game of empires. Run as a grand strategy forum game. 
3. The Chosen One and/or BBEG. Run as quest and represent their actions through the game of empires.
   
4. The marcher warzone. Run using Chainmail or something. Represents a particular front in the game of empires and overrules any more abstract rules present there.
   
5. The noble family. Run using Sword Chronicle. Owns a castle in the marcher zone. 
6. The West Marches. Run using your OSR system of choice (preferably something using domain rules so you can seamlessly scale up.) Keep used by the noble family as base. Probably the most familiar thing going on. Note that any of the above or below may go posting for “jobs” that these may answer.
7. The village. Run using the above, or Stonetop or Beyond the Wall. Or when paranoia strikes or an inquisition is launched, break out a game of Werewolf. Or for a different feel, The Quiet Year.
8. Dungeon factions. Run these as another forum game, or via Wicked Ones or something.
9. Ordinary people swept up in the tragedy of events surrounding them. Run as DCC-style funnels.
10. The inn. Run as a channel in the inevitable Discord. Let anyone join (perhaps in disguise if appropriate,) 
11. Shenanigans. All of the above have some boundary expectations. Although 1:1 time is an odd fit for it, an actual traditional table of people meeting once a week provides a fun chaos factor.
12. Why not? Use Bunnies & Burrows.
13. Licensing out. Use Shooting the Moon or any number of Solo games or just fiction to tell smaller stories without any referee to adjudicate or really even offer permission.

I’m presuming a cod-medieval extruded fantasy product for proof of concept and because that’s easy to coordinate shared understandings around, but there’s no need for your own megatable’s vision to be so limited.