Tekken DR, Wipeout Pulse, SFAlpha 3 MAX, Monster Hunter Freedom 2, Ridge Racer, castlevania Dracula X chronicles, Megaman Powered up, Genesis collection, Lumines, Killzone Liberation, Viewtiful Joe Red hot rumble, Wipeout Pure, Twisted Metal Head On, Mercury, Midway arcade treasures extended play, Megaman Maverick hunter X, Hot shots golf open tee, and Lemmings.
Some of these games have extra downloadable add ons like Megaman powered up.
Playing as Roll with a broom is badass.
Anyway, I own these games(as some of the melty community have seen) so I can safely recommend them to other PSP owners.