Although Uncharted 2 seems to be turning a lot of heads throughout the past few months, there are still those who are pumped and ready for the next Ratchet and Clank title; Ratchet and Clank Future: A Crack in Time. Those fans wanting some action will be pleasantly surprised at the prospect of two demos. While speaking on the Full Moon Show, Insomniac confirmed that it’s latest Ratchet and Clank title will be getting the dual demo treatment. The original large demo was to big in size so Insomniac split it into two separate ones. One demo will feature Ratchet gameplay whereas the other demo will be devoted to Clank gameplay. Insomniac Community Manager James Stevenson said (via NeoGAF) that the demo would be release prior to the release of the full-length game, which is October 27th.
Source: http://www.ps3center.net/news/3810/two-ratchet-and-clank-acit-demos-coming-to-psn-/