The Age of Decadence is CRPG set in a post-apocalypse ish, in which an analogue to the Roman Empire ruled most of the world until the collapse of civilisation, now it’s mostly city states struggling to survive and reclaim the old magitek of the empire.
Underrail: Life on earth’s surface has been made inhospitable ages ago, and the remains of humanity now live in the metro system called underrail and the caverns around it.
Both are isometric, turn based games that focus on combat and exploration. And they are hard. Builds are incredibly important, almost min maxing but they have a wide range of viable builds, especially the first one where you can play the entire game without fighting a single battle, all through alternative solutions and skill checks.