A weeklong Ubisoft Sale has started at OnLive. The deal for day 1 is Prince of Persia: The Forgotten Sands for $5 (75% off). It looks like it has controller support but it does say that you will require an Ubisoft account:
This game requires an Ubisoft account to play. You will be prompted to create or link to an Ubisoft account when launching your first Ubisoft title on OnLive.
This game has a 75/100 metascore. OnLive is an awesome cloud gaming service. I got my lady friend to play Amnesia over the service and she was scurred :P. Definitely recommend the service if you’re interested in playing games on your netbook and tablet (soon).