Anyone knows how to make it run on Win 11 or do I need to dual boot some other OS?

Thanks

Not sure if this is a universial solution, but if you open "Config" under "Additional Executables" from the drop-down menu next to "PLAY", you can change some simple settings. When the game didn't start for me, I changed the resolution to the highest (1024...) which made it work. It still sometimes starts "corrupted", ie unplayable (about half the time, actually) but I guess that's the type of quality we get from GOG nowadays