It's been a long time coming but OnLive is finally ready to try and silence its critics as the on-demand gaming service makes its official debut today. To celebrate the launch, the company announced a partnership with AT&T to offer U.S. customers a The service is launching today with over 20 titles available, including Prince of Persia, Tom Clancy's Splinter Cell, and Mass Effect 2. A "MicroConsole" that can be attached directly to HDTVs will be arriving later this year.