three unannounced SCEI games, shall we? Both games are adventure, investigation-type games according to PSPHyper. They're called Enkaku Sousa and Diamond and the Sound of a Gun Shot. The third mystery Sony title is apparently Resistance: Retribution, which is something we've known about since E3. Not really much mystery there.
The last title we'll mention in this article is Irem's Disaster Report game for PSP. The company is bringing the series of survival adventure games over to the PSP with Zettai Zetsumei Toshi 3. The series has come over Stateside before, so this one might turn out to be a title that could make its way over here.
Source 1 - PSP Hyper
Source 2 - PSP Hyper