First thing you need to know is that the PSP exclusive Kingdom Hearts prequel Birth by Sleep is due in stores September 7th. The next thing you need to know is that Gamestop will be selling an exclusive entertainment pack. It includes a “Mystic Silver” PSP-3000(yeah, I know)a copy of the game on UMD, a voucher to download a movie, and a 4GB Memory Stick Pro Duo. Sony hasn’t officially named a price, but they’ve all been $199 so far. Why stop now? For more details check out the PS Blog. Also, we embedded a trailer for the game, so you should watch that.