Parokki on 20 October 2007
Half of the people I know and have a PSP refer to it as "Playstation Portable Ops Player", so Metal Gear Solid: Portable Ops obviously if you care for the franchise. The only game on the PSP I really want other than that is Loco Roco, but again it's entirely possible that it isn't really your thing. If you don't have a PS2, then you might want to get some of the PS2-ports that you find interesting, but they're probably better played on the TV screen.
You also might want to check Metacritic for reviews btw.
