Black Geyser: Couriers of Darkness is a slightly obscure CRPG from Hungary / Austria
Coridden is a very unique ARPG from Sweden
If you are willing to slightly stretch your definition of european you can also get the IMO best two CRPGs on the market Pathfinder: Wrath of the Righteous and Warhammer 40k: Rogue Trader from Owlcat which have their headquarter in Cyprus, but if I understand correctly most of the actual development happens in Armenia.
Not judging, just curious.
What games are those? In the last 12 months I tried 151 games on Linux. All of them worked, only 6 required tinkering.