https://www.pcgamer.com/kingdom-come-deliverance-has-already-sold-more-than-one-million-copies/

Kingdom Come: Deliverance is a true PC game. It's buggy as hell, demands high-end hardware to run properly, and despite it all, thanks to its depth and attention to detail, it's really good. It's also a pretty big success. 

 Other signs that Kingdom Come: Deliverance is a real PC adventure: