Sony's director of hardware marketing John Koller says there are multiple key PSP titles coming out this year that are yet to be announced.
Speaking of the five-year anniversary of PSP today, Koller said: "As we move further into 2010, the innovation and technological prowess of the PSP system continues to be evident."
He added: "We have a plethora of exciting new games, some of which have yet to be announced, coming later this year that will continue to deliver the same unparalleled gaming experiences that you know and love."
This mirrors earlier statements from SCEA's Rob Dyer, who teased "big, big titles coming this year" for PSP from third party developers. Expect it all to go down at E3 in June.
PSP released in the US on March 24, 2005 (yes, it really has been that long) and has sold 17 million units in that territory to date.