Lacrimosa
Fundamentally this world is a post-apocalyptic, solarpunk themed world that is an excuse for bdsm and polyamory erotica and also the style of storytelling that’s lime Halo and Marathon. Sort of a tech-oriented mystery in addition to the sort of realpolitik
There is a sort of loose, Medieval level of globalization but there are still unknowns, especially because long-range communications have become a lot less long range due to the apocalypse. There are international organizations but no global entities (at least not in the public sphere).
This world is a contrast of beautifully restored holdouts alongside stark desolation and things that simply should not have survived as long as they have. Whike this is mostly a story setting it would be a perfect place for an apocalypse world game simply based on some of the constructs within.