If you missed it the last time, Atlus is back with a whole bunch of half-priced games on the PlayStation Network. These prices are good through February 15th, so you'll want to get a jump on them soon. The highest rated PSP game of all time, Persona 3 Portable, is only $19.99 in this sale. The remake of the original Persona is the same price. The PSP versions of Knights in the Knightmare and Yggdra Union have been added to the mix, and both are definitely worth the asking price. Yggdra Union is a particularly good deal at only about $7.
Here's the full sale list: