Only Metro Medicine (nearly done, requires double checking for balance purposes), the custom character sheet, and a GURPS cheat sheet (which will be made available for all gurps players/gms, because seriously, so necessary), and GURPS Metro is ready to play. I'll need a while longer to collect everything into something publishable to be a real worldbook, and need to do some splatbook art, but now that I'm halfway in practice drawing is enjoyable and moderately fast (and doesn't delay actually playing the game).
I don't actually have an adventure planned for the party built as of yet. Usually I have some fantastic setpiece event planned for the party to introduce them to the setting and start them on an adventure. Been working so hard to get the setting built that I haven't put thought into that (the ones I DID have were assuming a substantially different party makeup than I have. Was thinking "Capable but inexperienced young adults pulling an emergency guard duty", wound up with "A murderborg, a traveling trader, a mutant gunsmith, a young sniper trying to live up to the reputation of the man who trained him, a minor magical being masquerading as a child, and a con man down on his luck" which is more capable, more varied, and slightly harder to compose a setpiece event. Same one will work, it just doesn't grow as naturally into a proper story, although I can always get things started and give some freedom and see what develops from there).