Just got the one copy and loaded it up on the one computer at home. It's why I want to build a small portable CPU to take with me to work - but we *may* have to get 2 accounts. It just depends if we would ever want to play at the same time. At this point, I just need to get a good small tower - I kind of like the one's that have the handles on them - and then upgrade the motherboard on the main computer and get whatever else I need to get myself going :)