Got an invite to join the Steam playtest for this, had a quick go last night and it runs great on the Steam Deck OLED.
It's a funny set up, you are in a small Austrian town where a few years previous, monsters and portals appeared. Now they have regular 'Adventurers' arrive for holiday's to take the portals (These are the Dungeons) once you complete the Dungeon you get a stamp in your little adventurers book and then you can look to move onto other areas and tackle more, harder ones.
It's like if you head for a holiday to the Lake District and as well as the walks you fight monsters and tackle dungeons on the way
I really like it though, i'll give it more time over the weekend hopefully.