If you just want to play games, XP Home will work. Some of the difference with XP Pro is that Home will only recognize one CPU. So if you have Mac with Intel Core Duo or better, Home will only see one core while Pro will see both. Pro also has better integration with the Windows Server environment, but if you are using this at home, it probably isn't need. Games should not be a problem as XP home was designed as the consumer end to play games.