Ratchet And Clank Pic Of A Rhino What Is The Latest Game Of Ratchet & Clank For PS2?

What is the latest game of Ratchet & Clank for PS2? - ratchet and clank pic of a rhino

My friend loves this game, but the first game. I want to get the latest Ratchet & Clank on PS2 for him for Christmas. Can anyone tell me that I need to get it, thank you!