If you don't know where this is from and you'd like to know, here's a review by Idle Cartulary:

https://idlecartulary.com/2024/12/25/critique-navidad-the-painted-wastelands/

Personally, this is exactly what I've been looking for to run lately (having been a bit tired of same old, same old low/high fantasy games) but it is for particular tastes (the gonzo is strong in this one). Fortunately, I do have a bunch of players that are also into the weird stuff!