Works great on Windows 7 Professional 64bit I still have to adjust my screen resolution in advance of opening the game to 800x600 (or nearby) to allow the game to function properly. That said I don't really care because it is going to be viewed at that resolution anyhow. Everything has run super smooth so far, no issues or crashes. I was even able to get my old saved games and maps transferred over seamlessly. Thanks! Highly recommend