Got 'em all already on CD...don't need superfluous digital copies. Still, it's great to see them on offer and so cheap.
It claims they are DRM free, but I thought GG operated something like steam.
You have to run their downloader program (which has been buggy), but after installed you are free.
Iou have to tell the downloader to save the "temporary files" rather than install them right away. Haven't tried re/installing using the temp files, but that is the idea. Not sure if it requires a connection.
Maybe someone else here has tried this? I wonder what it checks? Perhaps just making sure you are the person that bought it by requiring a login? I don't seem to remember a limit on number of installs, but I could be wrong.