There were four Ratchet & Clank titles released on PlayStation 2 from developer Insomniac Games, which began in 2002 and ended in 05. If Sly Cooper can go HD, then why not?
HD Collections for PS3 include God of War (which started it all), ICO & Shadow of the Colossus and Jak & Daxter. Have you snapped up any of these HD Collections?