Kantor on 21 October 2009
I would say decrease in install base was the main factor. Ratchet and Clank was one of those series which made people think "Hey, this looks cool, I'll get it for the PS2 I already own!". It's not a huge franchise which would give people reason to own a console, like God of War or Gran Turismo, or like Uncharted will be next gen.
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