deja65: Driv3r is a licencing nightmare, licenced music especially. Driver San Francisco was available on Steam and uPlay for a long time but removed about two years ago.
The first two never saw a digital release, except for the PS1 versions that are available on PSN in the classics section as we speak. Parallel Lines is the only one on GOG sadly.
I think Ubisoft gave up on it since they tried rebooting the franchise with that Driver Speedboat mobile game abomination. It failed which was suprising ;). Cheers
EDIT: After double checking it looks like Driver 2 was also pulled from the US PSN at some point.
If memory serves correct, they took the game engine and updated it and rebooted it as Watch_Dogs franchise. I'd have to Google my math on that to be sure though. Maybe someone else can confirm.