Q Games No Longer Wants to Port Games to PSP

Q Games, creators of the popular PixelJunk series, are considering abandoning the PSP. Q Games founder Dylan Cuthbert says "I don't think we'll port anything else to the PSP...we have to see how [PixelJunk Monsters Deluxe] does as there's a 'lot' of piracy."

The PixelJunk series is a favorite of the PSN and has been well received by critics.  The most recent game, PixelJunk Monsters Deluxe, came out on October 01, 2009.

Source.