Gamestop has listed the game as coming out on PS2 on the 12th of February here. While there has been no official word from Sony, it wouldn't be the first big PSP title to get ported.

The blending of the PS2 and PSP continues as PSP's Ratchet and Clank: Size Matters appears to be marked for PS2 release early next year. A GameStop listing says the game is expected Feb. 12, '08 for $30, but consider this a placeholder for now.

Ratchet & Clank: Size Matters would join a solid list of games that made the jump from PSP to the PS2. Most famously at this point are the ports of GTA: Vice City Stories and GTA: Liberty City Stories, both of which ended up on the PS2 at the delicious consumer-friendly price of $20. We wouldn't mind seeing God of War: Chains of Olympus make the PS2 leap by holiday '08 -- but let's just get the thing out on PSP first.

Nyff via joystiq.com »