Frieren is a modern classic, with some of the best animation I've ever seen & deals with the themes of companionship and regret in a surprisingly mature way. It would be my recommendation for sure!
This is great news for the Open Source Godot game engine - Slay the Spire is a massive indie hit and the developers have ported the sequel to Godot after the recent Unity licensing fiasco.
If Slay the Spire 2 is even half as successful as the original, I think it's gonna be one of the most popular Godot titles ever launched.