Original: 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.
Simplified: 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.