The main OS is Linux (Ubuntu) with an external hard drive running Windows (it was removed from a laptop that had screen issues some years back that has yet to be replaced or properly inspected). Decker plays pretty well with Wine from my experience.
(Quick edit to add that I started the project on the Linux drive, and earlier today I wanted to play the Sims so it was running the Windows drive. The Windows side doesn’t read the Linux drive for some reason so I switch drives on boot if I need to)