Ratchet and
Clank (Future): Tools of Destruction came out in 2007, Ratchet a Clank: A crack
in Time came out in 2009, to bridge the gap, a short game (it took me less than
3 hours) was released on the PSStore in the US and was available on disk as
well in EU territories. It was merely there to set up some ideas, introduce a
few elements and keep us going from that cliffhanger.