Godsend is an alternative setting for Legacy 2nd Ed., trading themes of post-apocalyptic reconstruction for the nordic end of days.
It's 113 pages, with gorgeous, lush art and strong, thematic layout.
Mechanics-wise, it's a little bit like Microscope crossed with Ars Magicia, running on the No Dice No Masters engine.
That's probably a lot of words, so to unpack that a bit, you play as gods, their avatars, and also as those avatars' believers---shifting back and forth between those different roles whenever the story calls for it. You also play over a significant in-game timespan, making major changes to the setting as part of gameplay, and building and scarring a map to keep track of this. And the whole game is diceless, driven more by push-and-pull than chance.
All of this is explained helpfully and thoroughly by the game's opening text, and there's a *lot* of example text to illustrate how it works, but Godsend is definitely more complex in its setup than other No Dice No Masters games I've seen.
It's also potentially a bit PvP, which is highly unusual for No Dice No Masters. The player gods may be split on whether to save or wreck the world, and they're not assumed to all like each other or be working towards the same goal. This adds an interesting flavor to the game, where the mechanics are collaborative and the lore is competitive, and if you have a group that likes really leaning into the drama of competition without anyone at the table feeling burned, this is a game you should check out.
Content-wise, there's a bunch of cool domains to choose from, and the domain formula is pretty easy to hack if you want to make your own. There's also a lot of different flavors of avatar. Apostles---who are neither your god nor their direct incarnation---are much simpler, but still not bland.
For GMs, there's a well-organized section on how to run the game, and the most critical information is all front-loaded at the start of the book. Plus, everyone has a lot of narrative power, which takes some of the burden off of the GM.
Overall, if you want to tell a story about a place, and you want that story to be big and dramatic and transformative, Godsend is your game. It builds on its predecessors in a very effective way. It's also a great-looking book in general, and potentially useful as a "campaign zero" to create a world that you'll later play in with something more hero-focused and granular.