They made two Ratchet & Clank games for the Playstation Portable , called Ratchet & Clank : Size Matters and Secret Agent Clank . They also made a Playstation 2 version of Ratchet & Clank : Size Matters . They have released the titles Ratchet & Clank : Size Matters and Secret Agent Clank for the PlayStation Portable , as well as a PlayStation 2 port of Size Matters .