I have not played this game so I am not sure if it is multi-player or not however I do not believe so becuase it doesn't say it's mulit-player in the user manual. It should work with Windows XP. Not sure about Vista.... There doesn't seem to be any actual system requirements listed for the game on the box, but there are a few insrtuctions in the manual for tasks while using XP so I assume it is compatible.