I have a UK psp and a US Tiger Woods and a mate has a Japanese psp and a US Tiger Woods. Recently we tried head to head and we couldn't "see" each other to connect. I have since reported this to EA and the response is... Hello, Thank you for contacting us here at Electronic Arts Technical Support. I'm sorry that youre having difficulties with Tiger Woods for the PSP. Unfortunately you will need the same version of the PSP and the game. To be able to play the multiplayer feature of the game. Should you require further assistance about this or any Electronic Arts games in the future please visit our website and review our extensive Self Help knowledgebase http://support.ea.com Thanks! Mark EA Technical Support So there you go region DOES matter with games too!