Installing games every time you reinstall your system or doing it over multiple computer is always a pain.  Though you can create images to play it but Game Save manager can do all the hard work for you by saving most of the games installed in your computer. In simple words it backups, restore and transfer games with all the game settings you have done.
The application basically scans your computer ( specifically Programs folder ) to find out the installed games. So make sure you scan it first.
Once done you can backup all the games with one click. In case there is any issue you will see the warning.
You can also create custom entries by defining  the directory and mention which files are to be backuped up. In case you want to skip bigger files which you might  have created but do not require to backup just set a filter.
Also make sure to check the backup settings which allows you to go for high compression and few more options which is essential.
In case the application cannot find the games automatically, its possible that game is not supported, you can check in the manual of the game once installed. As of now there are 475 games supported.
  Download game Save manager