>>725125830
What do you mean by games? Installed games? You don't need to back up the entire game directory, just any personal files and user folders stored that can be copied and ported to a new install. Your save games are usually in your documents folder. So you only back those up to save space and back up faster so that if your HDD dies, all you need to do is reinstall the games.
And you'd probably need to do that anyway because porting whole games to new OS installs wouldn't work out of the box because of the registry.